M140 Multifunction Calibrator / Tester - meatest.cz

M-140 Multifunction Calibrator 

Operation manual

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Content 

Operation manual ...................................................................................................................... 1 

Basic Information ...................................................................................................................... 3 

Preparation for operation .......................................................................................................... 5 

Inspecting package contents, selecting the installation location .....................................................5 

Power-on ..............................................................................................................................................5 

Warm-up time .....................................................................................................................................5 

Replacement of fuse ............................................................................................................................6 

Safety precautions...............................................................................................................................6 

Description of controls .............................................................................................................. 7 

Front panel ..........................................................................................................................................7 

Rear panel .........................................................................................................................................13 

Control of the calibrator .......................................................................................................... 14 

Selection of function .........................................................................................................................14 

Setting the value of output signal ....................................................................................................14 

Setting relative deviation ..................................................................................................................16 

Change of value by factor of ten ......................................................................................................17 

Connection / disconnection of output terminals ............................................................................17 

Setting the frequency ........................................................................................................................18 

Generation of calibrated voltage .....................................................................................................19 

Generation of calibrated current ....................................................................................................21 

Generation of non-harmonic shapes ...............................................................................................22 

Simulation of resistance and capacitance .......................................................................................23 

Generation of electric power and energy ........................................................................................26 

Generation of frequency ..................................................................................................................31 

Simulation of temperature sensors..................................................................................................34 

Multimeter ................................................................................................................................ 38 

Basic menu ........................................................................................................................................38 

Function selection .............................................................................................................................39 

Setting the measurement range .......................................................................................................39 

Units of measurement .......................................................................................................................40 

Use of calculation formula ...............................................................................................................40 

Setting function parameters.............................................................................................................41 

Start of measurement .......................................................................................................................42 

Zero function .....................................................................................................................................42 

Simultaneous functions ....................................................................................................................44 

Operation manual v42 1

M-140 Multifunction Calibrator MEATEST 

Tester ....................................................................................................................................... 46 

Basic menu ........................................................................................................................................ 46 

Execution of test program ............................................................................................................... 46 

Programming the test ...................................................................................................................... 47 

Setting the type of signals and the number of steps ....................................................................................... 48 

Setting the numeric values of the test ............................................................................................................ 48 

Setting the relays............................................................................................................................................ 49 

Setup menu .............................................................................................................................. 50 

Calibration mode ..................................................................................................................... 54 

Error messages ........................................................................................................................ 72 

Functional description of the calibrator ................................................................................ 74 

Calibrator’s maintenance ....................................................................................................... 80 

Verification test ....................................................................................................................... 82 

System control ......................................................................................................................... 90 

IEEE-488 bus properties ................................................................................................................. 90 

RS232 bus properties ....................................................................................................................... 90 

Command syntax ............................................................................................................................. 91 

Standard Status Data Structures .................................................................................................. 105 

Examples of use..................................................................................................................... 108 

Calibration of measurement instruments .................................................................................... 108 

Multimeters .................................................................................................................................................. 108 

Powermeters ................................................................................................................................................ 110 

Counters and oscilloscopes .......................................................................................................................... 112 

Thermometers .............................................................................................................................................. 112 

Measurement .................................................................................................................................. 113 

Voltage, current and frequency .................................................................................................................... 113 

Measurement of resistance or temperature using resistance temperature sensors ....................................... 114 

Measurement of temperature using thermocouples ..................................................................................... 115 

Strain gauge sensors for non-electrical values ............................................................................................. 115 

Testing of regulation and measurement sets and evaluation units ............................................ 117 

Use of Opt. 140-41 cable adapter ................................................................................................................ 117 

Use of Option 40/60 cable adapter............................................................................................................... 118 

Use of Option 70 .......................................................................................................................................... 118 

Examples of tests ......................................................................................................................................... 118 

Testing ......................................................................................................................................................... 120 

Specification .......................................................................................................................... 121 

Accessories............................................................................................................................. 128 

Operation Manual Supplement ............................................................................................ 129 

Change 1 ......................................................................................................................................... 129 

2 Operation manual v42

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Basic Information 

M-140 Multifunction Calibrator is a multifunction calibrator-tester, to be used primarily as a standard 

for calibration laboratories. It can be used for calibration of any measuring instrument which measures voltage, 

current, resistance, capacitance and frequency. It generates fixed non-harmonic signals to allow calibration 

of measuring instruments using signals with non-zero harmonic distortion. Frequency, amplitude and duty cycle 

of output signal can be adjusted. M-140 Multifunction Calibrator is also suitable for basic calibration 

of oscilloscopes. 

The calibrator includes a function which simulates resistance and thermocouple temperature sensors 

and a built-in multimeter, which can be used simultaneously. Transducers of various types, regulators and 

sensing units can be therefore checked without the need for additional measuring instruments. 

Programmable functions of the calibrator, when used as a tester, include programming of a 10-step testing 

procedure, which completes automatically and displays a PASS/FAIL information in the end. This feature is 

linked to an independent relay output, which allows the control of other equipment. 

Basic features of the calibrator include: generation of calibrated DC and AC voltage in the range of 0 

µV to 1000 V, DC and AC current in the range of 0 µA to 20 A (50 µA to 1000 A when using a 50-turn coil). 

Maximum precision of the calibrator is 0.0035 % for DC voltage, 0.03 % for AC voltage, 0.013 % for DC 

current and 0.055 % for AC current. Maximum frequency range is 20 Hz to 50 kHz. The calibrator can generate 

periodic non-harmonic signal with defined duty cycle. This facilitates especially the checks of multimeters and 

their accuracy when measuring non-harmonic DC signals. 

The calibrator can also simulate a resistance or capacitance. Resistance range is 0 Ω to 50 MΩ; 

capacitance range is 1 nF to 50 µF, the accuracy suits the calibration of common multimeters. Basic accuracy 

of resistance ranges is 0.03 %. Basic accuracy of capacitance ranges is 0.5 %. The resistance can be used with 

AC signals up to 300 Hz to 1 kHz, depending on set-up value. 

Frequency ranges of the calibrator can generate a squarewave signal with definable and calibrated duty 

cycle and amplitude in the 1 mV to 10 V range and 0 to 10 kHz frequency range. Moreover, squarewave signal 

with very steep rising edge can be generated up to 20 MHz. Frequency ranges can be used to calibrate the 

corresponding frequency ranges of multimeters, as well as to calibrate the input sensitivity and time bases of 

oscilloscopes. 

Powermeter mode can be used to calibrate DC and AC single phase powermeters and energy meters. 

Voltage range is up to 240 V and current range is up to 10 A, power factor range is -1 to +1 and the resolution is 

1 % in the 40 Hz to 400 Hz frequency range. The voltage output can supply loads up to 30 mA, which allows the 

calibration of mechanical powermeters. 

Simulation of temperature sensors is yet another feature which can be used to calibrate thermometers 

and heat sensing units. The calibrator allows the simulation of all common Pt and Ni resistance sensors and R, S, 

B, J, T, E, K, N type thermocouples. Compensation of cold junction of thermocouple is achieved by entering 

the respective temperature using the calibrator’s keyboard. The accuracy of simulated temperature sensors 

depends on the value and type of sensor and ranges from 0.04 o C to 0.5 o C for resistance sensors and from 

0.4 o C to 4.3 o C for thermocouples. 

Internal multimeter with 20 mA, 20 mV, 200 mV and 10 V basic ranges and 0.01 % accuracy can be 

used to measure normalized signals coming from transducers, external thermocouples or resistance sensors or to 

measure pressure and force using strain gauge sensors. 

The calibrator includes many other features which facilitate easy use. For example relative deviation from set 

value of the output, currently displayed uncertainty of the output signal, calibration and testing procedures etc. 

The concept of calibrator control and indication of its status is based on flat luminiscent display, which provides 

all necessary information. The calibrator is controlled by opening menus on the display and selection from 

menus. Frequently used functions are assigned direct-control keys. The calibrator comes with standard GPIB bus 

and RS-232 serial line, which allow the calibrator to be controlled from a PC. 

The calibrator can easily fit within calibration systems featuring MBASE/WinQbase software support. 



ATTENTION ! 

The calibrator generates life-threatening high voltage. 

The calibrator can only be used in line with this 

Manual. 


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Preparation for operation 

Inspecting package contents, selecting the installation location 

Basic package includes the following items: 

• Multifunction calibrator 

• Power cord 

• Spare fuse T4L250/T, T8L250/T 

• Operation manual. 

• Test report 

• Test cable 1000V/20 A 2 pcs 

• Cable adapter Option 40 



• RS 232 cable 


The calibrator should be powered by 230/115 V – 50/60 Hz mains. It is a laboratory instrument whose 

parameters are guaranteed at 23±2 o C. Before powering on the instruments, place it on a level surface. Do not 

cover the vents at the bottom side and the fan opening at the rear panel. 

Power-on 

• Before connecting the calibrator to the mains, check the position of the mains voltage selector located at the 

rear panel. 

• Plug one end of the power cord into the connector located at the rear panel and connect the other end of the 

power cord into a wall outlet. 

• Switch on the mains switch located at the rear panel. Flat display is lit. 

• The calibrator performs internal hardware checks for 5 seconds. 

• After the tests conclude, the calibrator resets to its reference state, i.e. the following parameters are set: 

Function 

DC voltage 

Range 

20 V 

Set value 

10 V 

Output terminals OFF 

GPIB address of the calibrator is factory-preset to 2. This value is valid until the user changes it. 

Note. The calibrator resets to its reference status in case of power switching off and reconnection. 

Warm-up time 

The calibrator works after it is switched on and the initial checks complete. Specified parameters are only 

guaranteed after the instrument warms up for 60 minutes. During this period, the instrument cannot be calibrated. 

The display shows “cannot access the calibration” message if calibration is attempted during this period. 



Replacement of fuse 

The calibrator includes a fuse located in the mains connector at the rear panel. Replace the fuse as follows: 

• Switch off the calibrator 

• Remove the end of power cord from the mains connector at the rear panel. 

• Insert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pull out the fuse 

holder. 

• Remove the fuse and replace it with new fuse of the same rating. 

Safety precautions 

The instrument has been designed in Safety Class I according to EN 61010-1. The design reflects the 

requirements of A2 amendment of the standard. 

Safety is ensured by the design and by the use of specific component types. 

The manufacturer is not liable for the damage caused by modification of the construction or replacement of parts 

with non-original ones. 

Safety symbols used on the equipment 

Warning, reference to the documentation 

Warning - risk of electric shock 

Danger - high voltage 


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Description of controls 

Front panel 

The front panel of the calibrator includes a flat luminiscent display, control buttons and output terminals. The 

following picture shows the control part of the front panel. 

3 5 

1 2 4 6 7 

1 Display buttons 

There are five buttons below the display, whose meaning changes depending on the contents of the display. 

These buttons usually call-up the MENU, allow range change, step, logging of values etc. 

2 Cursor buttons 

Using these buttons, the cursor can be controlled within allowed limits on the display. The keyboard includes 

two buttons () which allow the cursor to be set to the required position at the display. The cursor can be 

moved to the left or right. These buttons are usually used to step through the options and to move from one 

option to another or between the menu levels. Numeric values can be set in some control modes as well. In these 

cases, the buttons marked (∧, ∨) allow the user to increase or decrease the number at the cursor button. 

The central button is used to confirm the selection (ENTER), or to SELECT from the menu. 

3 Potentiometer 

The potentiometer integrates several functions. By turning the knob to the left or right, the user can: 

• step through the options 

• enter numeric values 



The function of the potentiometer can usually be performed by the cursor buttons. The central button is used to 

confirm the selection (ENTER). 

4 Numeric keyboard 

The keyboard allows the entry of numeric values on the display. The central button is used to confirm the 

selection (ENTER). CANCEL button can be used to cancel the entry. 

5 Function buttons 

Function buttons can be used to call-up the functions of the calibrator directly. The following buttons are 

provided: 

function 

DC voltage 

AC voltage 

DC current 

AC current 

resistance / capacitance 

power / energy 

frequency 

internal multimeter 

simulation of temperature sensors 

button 

U / DC 

U / AC 

I / DC 

I / AC 

R – C 

P – E 

F 

METER 

T 

After the function mode is changed, the parameters of the respective function are restored. If the respective 

function was never used, the calibrator resets to its reference values. Reference values for individual functions 

are listed below. 

function value parameters 

DC voltage 10V - - 

AC voltage 10 V f = 1000 Hz 

DC current 100 mA - - 

AC current 100 mA f = 1000 Hz 

resistance 

100 kΩ 

capacitance 1 µF 

power 100 W f = 100 Hz *1 

energy 

frequency 1000 Hz U = 1 Vsym 

multimeter 10 V DC voltage 

simulation of temperature sensors 100 o C Pt 100/1.385, ITS90 

cold junction temperature of TC sensors 23 o C R 

*1 

U = 100 V, I = 1 A, PF(power factor) = 1 LA, active power is displayed in Watts 


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6 Output / input terminals buttons 

OUTPUT button is used to connect the output signal of the calibrator to the output terminals. The connection is 

confirmed by red LED and a symbol at the display. 

METER button can be used to connect the input terminals to the internal multimeter. The connection is 

confirmed by green LED. 

7 Output / input terminals 

Output signal of the calibrator is connected to the output terminals. Current ranges are connected to +I / -I 

terminals, frequency output is connected to FREQ terminal. All other functions (voltage, resistance, 

capacitance) are connected to Hi / Lo terminals. 

GND terminal is connected to the chassis of the calibrator. It is connected to the ground terminal of the mains 

plug. Using the SETUP MENU of the calibrator, the output terminals of the calibrator can be grounded as well. 

Grounding is done internally by connecting Lo and GND terminals using a relay. This circuit design is suitable 

for most calibrations, when the object (multimeter) being calibrated is floating. 

AUXILIARY connector creates input of internal multimeter. It includes a limited range of output signals of the 

calibrator as well. The layout of individual pins and their meanings are listed in the following table. 

Auxiliary connector can be used with one of cable adapters Opt. 40, 60, 70, Opt. 140-41. Calibrator can 

recognize which type of adapter is connected and displays the information on front panel display. 



pin label signal Limitation 

1 0V5MER common terminal of multimetr power supply source 

2 GND ground (protection earth) 

3 SIMLI RC simulator output, current terminal Li Umax.= 10Vpp, Imax.=40mA 

4 SIMLU RC simulator output, voltage terminal Lu Umax.= 10Vpp, Imax.=40mA 

5 GND ground (protection earth) 

6 L common terminal of multimeter input 

7 -U low output terminal for DC voltage range 

8 -I low output terminal for DC current range 

9 NG2 sort function output, contact 2 of sort relay Umax.=50Vpp, Imax.=100 mA 

10 PTLI resistance temperature sensor input terminal Li Umax.= 10Vpp. R

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8 Display 

1a 1b 1c 1d 1e 2a 3 2b 1g 1f 

The display is divided to three horizontal sections: 

1. OUTPUT section 

This section displays the set-up values of generated signals and the data related to the calibrator status. The 

section includes the following types of data: 

a) Information line 

• designation of display section: OUTPUT 

• error messages. The messages appear when an attempt is made to set up an invalid state of the 

calibrator, if analogue circuits of the calibrator are overloaded or if a communication error occurs 

when the calibrator is controlled using GPIB bus. 

• real date and time, if its display is set-up in the setup menu. 

b) Auxiliary data 

This line displays the total value of output signal if a non-zero relative deviation is set. 

c) Main data 

This line displays the main data of the output signal and the unit of measurement (using double size 

signs). The line also includes two symbols (▼▲) to define the actual position of the cursor during 

adjustment of the value. buttons can be used to move the cursor and ∧, ∨ buttons to change the 

value. (The value can be also changed using the potentiometer). 

d) Monitoring line 

This line displays the numbers entered using the numeric keyboard when the main data are set using the 

numeric keyboard. The information allows the entered information to be checked. 

e) Minor data 

There are two lines displaying the minor data of the output signal, especially: 

• set relative deviation from main set value in % 

• frequency (for DC voltage, current, power, energy functions) 

• set value of current, voltage or power factor (phase) for power, energy functions 

• value of R0 resistance and the type of resistance temperature sensor 



• cold junction temperature of TC sensors and the selected type of TC sensor 

• value of amplitude and shape type for frequency function 

f) Information section 

The information section located in the right part of the display displays additional information related to 

the selected function: 

• symbol of connected or disconnected output terminals. 

At the same time, a LED located above the OUTPUT button is lit. 

• information about remote/local control of the calibrator. If the calibrator is controlled remotely, 

REM is displayed. If the calibrator is controlled locally using the keyboard, LOCAL is displayed. 

• information about the use of 50-turn coil (COIL x50) at the current output of the calibrator, if this 

feature is turned on using the SETUP menu. 

• information about the type of connected cable adapter, if used 

• information about the grounding method of output terminals: GND I, GND U as set up using the 

setup menu. 

g) Information about the uncertainty of the output signal 

This section displays the maximum error of the main value of the output signal. The value is calculated 

using the main specification listed in the User’s Manual and it is displayed in %. 

2. INPUT section 

This section displays the values measured by the multimeter. The section includes following data: 

a) Main value of measured signal 

This line displays the measured value and the unit of measurement. If the input signals exceed the 

permitted range, OVERFLOW is displayed. 

b) Designation of selected function of the multimeter 

Symbolic display of selected function of the multimeter: V DC, mA DC, mV DC, R 4W, Freq, T TC, T 

RTD, SGS, ACAL. 

3. Display buttons section 

This line displays the symbolic descriptions which define the meaning of four related display buttons. The 

respective meanings are as follows: 

symbol button function note 

x 10 

increase set value 10 x 

: 10 decrease set value 10 x 

Shape selection of signal shape only for U, I, F functions 

+/- reversed polarity of output voltage and current only for DC U, DC I functions 

EXIT move up one level only for F, P-E functions 

Calib. 

SETUP 

enter the calibration menu 

enter the setup menu 

TC type selection of thermocouple sensor type only for T function 

RTD type selection of resistance temperature sensor type only for T function 

f enter the frequency of the signal only for U, I function 

MODE select the unit of measurement only for AC P-E function 


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Rear panel 

The rear panel of the calibrator includes ventilation holes, power cord socket with fuse, mains voltage selector, 

mains switch, IEEE 488 connectors for connection to GPIB bus and type plate with serial number. 

5 

1 

2 

4 3 

1 air inlet - forced ventilation 

2 air outlet - forced ventilation 

3 GPIB, RS-232 connectors 

4 power cord socket with fuse, mains voltage selector, mains switch 

5 type plate 

Operation manual v42 

13


Control of the calibrator 

Selection of function 

After the power is switched on and the initial checks complete, the calibrator resets to its reference status, i.e. DC 

voltage output with set value of 10 V and output terminals disconnected. Internal multimeter is switched off. The 

status of the calibrator can be changed using the buttons located at the front panel in one of the following ways: 

1. Change of function by pressing one of direct function buttons 

After pressing one of the U, I, DC-AC, R-C, P-E, F, T, METER buttons, the calibrator switches to the desired 

function mode and resets to the reference or to the most recently used parameter setting. 

2. Connection /disconnection of output terminals 

After pressing the OUTPUT button, the output terminals of the calibrator are connected/disconnected. 

3. Connection /disconnection of multimeter 

After pressing the INPUT button, the multimeter starts measuring the value present at the input terminals, 

depending on the function mode of the multimeter. The measurement is only possible when any of Opt. 140-xx 

adapters is connected to the AUXILIARY connector. 

4. Entry to the setup menu 

After pressing the SETUP button, options of the SETUP MENU appear on the display and the display buttons 

allow the entry to the calibration mode (CALIB) or entry to the mode when the calibrator is used as a tester 

(TESTER). Previous function is restored by pressing of EXIT display button. 

Setting the value of output signal 

All function modes allow several methods of setting the main value of the output signal: 

Entry of the value using numeric keyboard 

• use the numeric keyboard to select the desired value. After the first digit is entered, symbols of unit 

of measurements are displayed above the display buttons. The monitor line displays the symbols 

[ _ _ _ _ _ _ _ _ ]. 

• the same entry can be started by pressing the central cursor button 

• after the entry is complete (the value is displayed on the monitor line), press the display button 

below the desired unit of measurement (V, mV or µV in the example below) 

• the value is copied to the main display and the monitor line disappears. 


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Entry of the value using cursor buttons 

• press , ∧ or ∨ button. The display now includes cursor marks which point to the active digit. 

• ∧ and ∨ buttons can be used to change the active digit. buttons can be used to change the 

position of the cursor marks 

• to get to the default screen, press EXIT button or keep pressing the center cursor button until there 

is no [ _ _ _ _ _ _ _ ] under any value. All values can be set using the buttons or the potentiometer. 

Entry of the value using the potentiometer 

• press the potentiometer knob. The display now includes cursor marks which point to the active 

digit 

• turn the knob to change the active digit 

• press the potentiometer knob to change to the mode which allows to change the value of the active 

digit. ← and → symbols are displayed above the active digit. Active digit can be changed by 

turning the knob. 

• turn the knob to change back to the mode which allows to change the position of the active digit. 

• to get to the default screen, keep pressing the center cursor button until there is no [ _ _ _ _ _ _ _ ] 

under any value, or press EXIT button. All values can be set using the buttons or the potentiometer. 

Reverse polarity 

In DC voltage and DC current modes, the polarity of the output value can be reversed by pressing +/- display 

button. „ - “ symbol appears in front of the main data value. 



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Setting relative deviation 

All function modes of the calibrator except frequency mode allow a relative deviation of output value from the 

main data to be set using a separate display. Relative deviation is displayed in the “minor data” section of the 

display and is designated with „ ∆%= 00.0000 % “ symbol. The relative deviation can be entered using one of 

the methods described above, e.g. using the numeric keyboard, cursor keys or the potentiometer. 

Setting relative deviation using numeric keyboard 

• keep pressing the center cursor button until [ 

_ _ _ _ _ _ _ ] symbols appear under the relative 

deviation value in the “minor data” section of the display 

• enter the desired deviation and confirm the value by pressing “ % “ display button or by pressing 

ENTER on the numeric keyboard 

• the auxiliary line below the main data on the display displays the total value of output signal 

including the unit of measurement 

• the value of the signal at output terminals is: the value indicated by the main display + ∆ %. 

Maximum relative deviation which can be entered is ± 30.000 %. 

The deviation can be positive or negative. If negative deviation is desired, press the display button labeled +/-. If 

positive deviation is then desired, press “ +/- “ button again. The polarity of the relative deviation can be 

reversed using the cursor buttons or the potentiometer as well. 

Setting relative deviation using cursor keys 

• keep pressing the center cursor button until [ 

_ _ _ _ _ _ _ ] symbols appear under the relative 

deviation value 

• press , ∧ or ∨ button. The display now includes cursor marks which point to the active digit 

• ∧ and ∨ buttons can be used to change the active digit. buttons can be used to change the 

position of the cursor marks 


under any value, or press EXIT button. All values can be set using the buttons or the 

potentiometer.. 

16 

Operation manual v42

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Setting relative deviation using potentiometer 

• keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] symbols appear under the relative 

deviation value in the “minor data” section of the display 

• press the potentiometer knob. The display now includes cursor marks which point to the active 

digit. Turn the knob to change the value of the active digit 

• press the potentiometer knob to change to the mode which allows to change the position of the 

active digit. ← and → symbols are displayed above the active digit. The position of the active digit 

can be changed by turning the knob. 

• turn the knob to change back to the mode which allows to change the value of the active digit 


under any value, or press EXIT button. All values can be set using the buttons or the potentiometer. 

If a non-zero relative deviation is set, the main data can be changed as well. The value of the output signal is 

always recalculated. If a zero relative deviation is set, the “minor data” section is not displayed. 

Change of value by factor of ten 

All functions of the calibrator allow the increase of the output value by 10 or reduction of the output value by 10. 

Such operation is equivalent to the change of internal range only in U, I, P-E modes. If the change results in 

overflow or underflow of calibrator’s range, an error message appears: 

Value too large ! 

Value too small ! 

if the resulting value is too large 

if the resulting value is too small 

Range change 

• Press the display button labeled “ x10 “ if you want to increase the range, “ :10 “ to decrease the 

range. 

• The main value shown on the display is increased 10x (reduced 10x) 

P-E function changes the current, not voltage, when the range is changed. 

R-C function changes the set value 10x. The procedure, however, cannot be used to step the internal 

resistance/capacitance ranges, which are not decimal. 

T function also has other than decimal ranges and the change of set value 10x therefore does not correspond to 

internal range change. Internal range change in this case depends on the temperature sensitivity of the 

resistance/capacitance. 

Connection / disconnection of output terminals 

After switching on the output terminals are disconnected in all modes. Press the OUTPUT button to connect the 

output signal to the terminals. Red LED above the OUTPUT button is lit and the information field on the 

display shows the following symbol . 

Press the OUTPUT button again to disconnect the output terminals. Red LED goes off and the information field 

on the display shows the following symbol . 

During mode change, output terminals are always disconnected. Output terminals are disconnected also when 

changing between voltage and current ranges or when changing between AC and DC ranges is performed. 



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If voltage over 100 V is set in the voltage mode, special algorithm must be followed to connect the output 

terminals. The algorithm is described in the „Generation of calibrated voltage“ chapter of this Manual. 

Setting the frequency 

Frequency can only be selected in AC voltage (ACU) mode, AC current (ACI) mode , power (P-E) mode and 

frequency (f) mode. In each mode the frequency has a slightly different meaning and the frequency is therefore 

set in a different manner. 

AC voltage (ACU), AC current (ACI) 

Set value of frequency is included in the “minor data” section of the display in ACU, ACI, P-E modes. 

Frequency change 

• First select the AC voltage or AC current mode by pressing U (I), AC buttons or selecting the P-E 

mode using the display. Frequency value „f = xxx.xx Hz“ appears in the “minor data” section of 

the display. “ f “ symbol is displayed above one of the display buttons. 

• After “ f “ display button is pressed, [ _ _ _ _ _ _ _ ] symbols appear below the frequency value. 

Numeric keyboard can be used to enter the desired value. Press “ Hz “ or “ kHz “ to confirm the 

value. The value can be set using the buttons or the potentiometer. 

If too large or too small value is entered, the calibrator displays the maximum (minimum) value which is allowed 

for the selected function. 

Frequency (F) 

Set value of frequency is the main data on the display and the main parameter of the signal. Main data can be set 

by direct entry using the numeric keyboard, potentiometer or by changing the digit at the current cursor position. 

The setting procedure is described in the “Setting the value of output signal”. 

18 


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If frequency larger or smaller than the calibrator’s range is entered, the calibrator displays an error message: 

„Value is too large (small)“. 

Generation of calibrated voltage 

The multifunction calibrator provides calibrated DC and AC voltage. Output terminals for voltage ranges are 

labeled “ Hi “ and “ Lo “ at the front panel. Depending on the setting of the calibrator, voltage up to 1000 Vef 

can be present at the terminals . 

DC voltage range is 0 to 1000 V. 

AC voltage range is 100 µV V to 1000 V. 

Output voltage up to 20 V is available at AUXILIARY connector. It can be used only with cable adapter Opt. 

140-41. 

Control in the voltage mode 

• Press “U” button on the calibrator and then select AC or DC mode by pressing “DC-AC” button. The 

display shows the following data: 

* main data of set voltage 

* relative deviation 

* uncertainty of output voltage 

* frequency (when AC voltage is generated) 

* total value of output voltage when non-zero relative deviation is set 

• Set the desired value of voltage, including polarity when necessary, frequency and relative deviation. The 

signal is yet not connected to the output terminals. The information section of the display shows the symbol 

which informs about the disconnection of output terminals. 

• Press OUTPUT button. 

• Red LED is lit above the OUTPUT terminals to signal the connection of the signal to the output terminals; 

the information ion section of the display shows the symbol . 

• Calibrated voltage corresponding to set parameters is present at the output terminals. 


19


Control sequence when output voltage over 100 V is selected 

When output voltage over 100 V is selected, the information section of the display shows the symbol which 

informs that a life-threatening voltage will be present at the output terminals. If the output terminals are currently 

connected, they will be disconnected when output voltage over 100 V is selected. OUTPUT button must be 

pressed to reconnect the output signal to the output terminals. After the OUTPUT button is pressed, an 

interrupted beep is sound, OUTPUT LED is lit and the information section of the display shows the symbol 

notifying the user about the connection of the dangerous output signal to the output terminals. 

Voltage, polarity, frequency, absolute and relative deviation can be set without the outputs being disconnected. 

The output terminals are automatically disconnected when changing between AC and DC ranges or when 

changing the function mode. 

Using AUTOCAL function 

To remove the effect of short-term drift and temperature dependency of small DC voltages, AUTOCAL function 

can be used. It can only be activated in the calibration mode. “Calibration mode” lists the respective procedure. 

Overloading of terminals 

If the output terminals are overloaded or short-circuited in the voltage mode, the calibrator disconnects the signal 

from the output terminals and reports „Overload U output“ error. 

ATTENTION DANGEROUS VOLTAGE 

Never touch the measurement circuit when voltage over 50 V is set and 

output terminals are connected! 

When working with voltages over 50 V, rules for work with dangerous 

voltage must be adhered to. 

ATTENTION DANGEROUS VOLTAGE 

When the calibrator is controlled remotely, it is not possible to disconnect 

the output voltage using the buttons located at the front panel! 

The calibrator must be first switched to local control mode by pressing the 

LOCAL button and then the output terminals can be disconnected or the 

mains switch must be switched off ! 


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Generation of calibrated current 

The multifunction calibrator provides calibrated DC and AC current. Output terminals for voltage ranges are 

labeled “ +I “ and “ -I “ at the front panel. The terminals can carry high current and are the only terminals to 

which the calibrated object can be connected. Depending on the setting of the calibrator, current up to 20 A ef can 

be driven by the terminals. 

DC current range is 0 to 20 A 

AC current range is 1µA to 20 A 

When 50-turn coil (option 140-50) is used, AC current range is 50µA to 1000 A. Output current up to 20 mA is 

available at AUXILIARY connector and it is accessible via cable adapter Opt. 41-41 only. 

Control in the current mode 

• Press “I” button on the calibrator and then select AC or DC mode by pressing “DC-AC” button. The display 

shows the following data: 

* main data of set current 


* uncertainty of output current 

* frequency (when AC current is generated) 

* total value of output current when non-zero absolute or relative deviation is set 

* time after which the output terminals will be disconnected when the output current over 10 A is 

selected. 

• Set the desired value of voltage, including polarity when necessary, frequency and relative deviation. The 

signal is yet not connected to the output terminals. The information section of the display shows the 

symbol which informs about the disconnection of output terminals. 

• Connect the load or short the output terminals labeled +I, -I. 


• Red LED is lit above the OUTPUT terminals to signal the connection of the signal to the output terminals; 

the information section of the display shows the symbol . 

• Calibrated current corresponding to set parameters is driven by the output terminals. 

• If COILx50 function is activated (see below - Setup functions menu), the optional 50-turn coil must be 

connected to output terminals. The calibrator can be used to calibrate 50 µA to 1000 A ammeters. The 

calibrator generates AC and DC current within the range up to 20 A. 

CAUTION 

If GND terminal is connected to Lo, -I terminals, it is prohibited to connect 

external load to GND / Hi or GND / +I terminals. Such connection can 

damage the calibrator. 



Overloading the terminals 

When external circuit connected to current output terminals is disconnected or there is higher voltage at the load 

than permitted, the calibrator disconnects the output terminals and displays „Overload I output“ message. The 

same message can be displayed when 50-turn coil is used for AC current output at frequencies above 80 Hz. It 

depends on the set current and the type of ammeter connected. 

If the output terminals are disconnected due to time limitation of output current over 10 A, the calibrator displays 

„Current timeout !“ message. 

Generation of non-harmonic shapes 

The multifunction calibrator can generate non-harmonic periodic signals with predefined shape. To allow the 

setting of a non-harmonic output shape, the calibrator must be switched to AC U or AC I mode. In both cases, an 

indication of the type of output shape (Shape xxxxx) is displayed under the frequency value. Press the respective 

display button to change the shape of the output signal. 

The calibrator can generate the following shapes: 

• SINE harmonic 

• PWM POS squarewave - positive, with adjustable duty cycle 

• PWM SYM squarewave - symmetrical, with adjustable duty cycle 

• PWM NEG squarewave - negative, with adjustable duty cycle 

• RAMP A ramp, symmetrical positive 

• RAMP B ramp, symmetrical negative 

• TRIANGLE triangular, symmetrical 

• LIM SINE harmonic with amplitude limitation (truncated sin) 

Generation of non-harmonic signals has some limitations: 

• non-harmonic voltages can be generated in the 0.1 Hz to 1000 Hz frequency range 

• non-harmonic currents can be generated in the 0.1 Hz to 120 Hz frequency range 

• generation of these signals is limited to the voltage range up to 200 V and current range up to 2 A 

• non-harmonic signals cannot be generated in the P-E (power-energy) mode. 

Control in the non-harmonic mode 

• Select AC voltage or AC current mode. The main section of the display shows the following data: 

* main data of set current or voltage, unit of measurement 


* frequency 

* selected SHAPE of the output signal 

• Keep pressing SHAPE display button to select the desired shape of the output signal: 

The output terminals are automatically disconnected when changing the shape of the output signal or when 

changing the relative deviation ∆%, if a non-zero relative deviation is set. 

Displayed information 

When non-harmonic output shape is selected, the display shows additional information: 

• besides the main amplitude data, „pk“ index is displayed, notifying that the displayed main value is the peak 

value. Symbol which displays the shape of the output signal is displayed too. 


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• below the main data, an information about the shape type „Shape xxxxx“ is displayed. 

• below the main data, calculated effective value of the output signal is displayed. 

• for squarewave signals, set value of duty cycle „PWM= xx %“ is displayed. 

Simulation of resistance and capacitance 

The multifunction calibrator can simulate an exact value of resistance or capacitance. The outputs of the 

simulator are connected to Hi – Lo terminals and to AUXILIARY connector (pins 20, 21, 22, 23). 4W resistance 

is accessible only via cable adapter Opt. 70. 

Only two-wire wire connection is available on the front panel terminals Hi-Lo. Both two-wire and four-wire 

connection is possible only through AUXILIARY connector. The terminals SIMHI - SIMLI are current 

terminals and SIMHU - SIMLU are voltage sensing terminals. Cable adapter Option 70 or cable adapter Option 

140-41 must be used for four-wire connection. Type of cable adapter currently connected to the AUXILIARY 

connector, is displayed on the display. If Option 70 is connected, label CA 140-70 is displayed in the right side. 

If Option 140-4141 is connected, label CA 140-41 is displayed. 

Cable adapter Option 70 can be used for four-wire connecting of simulated resistance only. In compare with 

direct two-wire wire connection through output terminals Hi – Lo, accuracy of resistance is better with Option 70, see 

Technical data. If Cable adapter Option 70 is connected to the AUXILIARY connector, only resistance mode 

and resistance temperature simulation mode can be chosen. 

The resolution of resistance and capacitance depends on the set value and corresponds to 0.01 % of set value. 

Minimum set value is 0.01 Ω 

Resistance simulation range is 0 Ω to 50 MΩ. 

Capacitance simulation range is 0.9 nF to 50 µF. 

Control in the resistance and capacitance mode 

• press R-C button on the calibrator. The display shows the set resistance. 

• If you want to simulate a capacitance, press R-C button again. The display shows the set capacitance. 

• The display shows the following data: 

* main data of set resistance (capacitance) 

* relative deviation of resistance (capacitance) 

* uncertainty of set resistance (capacitance) 

* total value of resistance (capacitance) if non-zero deviation is set 


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• Set desired value of resistance (capacitance) or relative deviation. The value can be set using numeric 

keyboard, potentiometer or cursor buttons. Simulated resistance (capacitance) is not yet connected to the 

output terminals. The information section of the display shows the symbol which informs about the 

disconnection of output terminals. 

• Connect the object to be calibrated to the output terminals labeled Hi - Lo. 


• Red LED is lit above the OUTPUT terminals to indicate the connection of simulated resistance 

(capacitance) to the output terminals. The information section of the display shows the symbol 

Simulated resistance (capacitance) is connected to output terminals. 


• Keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] symbols appear under the relative deviation 

value (∆% = xx.xxxx %). 

• The value can be set using numeric keyboard, potentiometer or cursor buttons. Confirm the value by 

pressing “%” display button or by pressing ENTER. 

Limitations resulting from electronic simulation 

Electronic simulation of resistance and capacitance allows setting of a wide range of values with accuracy 

sufficient for calibration of common multimeters. Electronic simulation has the following limitations: 

• measurement current supplied by the multimeter to be calibrated must not exceed the value specified by the 

calibrator’s documentation. If the current is exceeded, the accuracy of simulated value is not guaranteed. 

• maximum peak voltage at Hi - Lo terminals supplied by the multimeter to be calibrated must not exceed 

specified limits. If the test voltage is exceeded, calibrator disconnects output terminals. Overload message is 

displayed on the display. 

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Frequency dependence of resistance and capacitance 

Electronic simulator of resistance can be used with DC and AC test signal. Electronic simulator of capacitance 

can be used in AC range from 20 Hz to 1000 Hz. 



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Generation of electric power and energy 

The multifunction calibrator can generate exact value of electric power and energy. P-E function provides output 

voltage at Hi - Lo terminals and output current at +I - -I terminals. Lo and -I terminals are electrically connected. 

Power setting range: 

Voltage setting range: 

Current setting range: 

Power factor setting range: 

Frequency setting range: 

0.0 VA to 2400 VA 

0.2 V to 240 V 

0.01 A to 10 A 

-1 to +1 (phase –90 to +90 °) 

DC, 40 Hz to 400 Hz 

Control in power generation mode 

• Press “P-E” button on the calibrator and then select AC or DC mode by pressing “DC-AC” button. The 

display shows set power value. 

• The display shows the following data:: 

* main value of set power in selected unit of measurement VA, W, VAr 

* power factor value PF in negative polarity LA or positive polarity LE or the phase shift between the 

voltage and current in °. 

* frequency, if AC power is selected 

* voltage at Hi - Lo terminals 

* current through +I - -I terminals 

* uncertainty of set power 

• Set desired value of power using numeric keyboard, potentiometer or cursor buttons. Output power is not 

yet connected to the output terminals. The information section of the display shows the symbol which 

informs about the disconnection of output terminals.. 

• Connect the instrument to be calibrated to Hi - Lo and +I - -I terminals or short the +I - -I terminals. 


• Red LED is lit above the OUTPUT terminals to indicate the connection of simulated electrical power to the 

output terminals; the information section of the display shows the symbol 

Desired power is connected to output terminals. 

Display modes 

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The calibrator can display AC power in one of three ways: 

• apparent power in VA 

• active power in W 

• reactive power in VAr 

Keep pressing MODE display button to change the function mode. Along with mode change, the power display 

(depending on set power factor) and unit of measurement change as well. If DC power is generated, it is always 

displayed in Watts. 

The calibrator can display the phase relation of output voltage and current as power factor (–1 to +1) or as phase 

shift in degrees (0 to 360 °). SETUP setup menu is used to change the method of displaying the phase relation. 

Power setting modes 

The calibrator allows several ways of setting the value of generated power. 

1. Setting the main power value 

• The main value can be changed using numeric keyboard, changing the digit at the cursor position 

after selecting the cursor position with buttons, by range change using „x10“, „:10“ display 

buttons, or using the potentiometer. 

• Output power is changed by changing the value of output current. 



2. Setting the voltage 

• The main power value can be changed by changing the voltage. 

• Select P-E mode and then keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] symbols 

appear under the voltage (U = xxx.xxxx V). 

• The value can be set using numeric keyboard and confirmed by pressing µV, mV, V display button. 

The value can be set using cursor buttons or potentiometer as well. 

• Main power value is recalculated using new set voltage and existing setting of current and power 

factor. 

3. Setting the current 

• The main power value can be changed by changing the current.. 


appear under the current (I = xx.xxxx A). 

• The value can be set using numeric keyboard and confirmed by pressing µA, mA, A display button. 

The value can be set using cursor buttons or potentiometer as well.. 

• Main power value is recalculated using new set current and existing setting of voltage and power 

factor. 


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4. Setting the power factor (AC power only) 

• If W or Var is indicated, the main power value can be changed by changing the power factor. 

Change of power factor does not change the output apparent power. 


appear under the power factor symbols (PF = x.xxx LA (LE) or Phase = xxx.x). 

• The value can be set using numeric keyboard and confirmed by pressing LA/LE (°) button or by 

pressing ENTER. 

• Main power value is recalculated using new set power factor and existing setting of current and 

voltage. The calculation is only made if active or reactive power is displayed. 

In the power generation mode, relative deviation cannot be set. 

If the power factor is set to define the phase relation of voltage and current, confirmation of entered 

value by pressing LA button means positive phase, LE means negative phase. 

Setting the energy 

Keep pressing the P-E button to switch to the energy generation mode. Auxiliary data display area 

shows the time in seconds and the energy delivered to output terminals after pressing the OUTPUT 

button given the existing setting of voltage, current, frequency and power factor. Time setting range is 

1.1 s to 1999 s. 



The energy value can be set in two ways: 

Direct setting of energy 

• Select the energy mode and then keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] symbols 

appear under the time value (E = xxx.xxxx) supplemented with indication of the set mode. 

• The value can be set using numeric keyboard, cursor buttons or potentiometer and confirmed by pressing 

Ws/kWs/MWs, VAs/kVAS/MVAs or VArs/kVArs/MVArs display buttons depending on the set mode. The 

value can also be confirmed by pressing ENTER. 

• Time value is recalculated using new set energy. 

Setting the time 

• Select the energy mode and then keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] symbols 

appear under the time value (t = xxx.x s). 

• The value can be set using numeric keyboard, cursor buttons or potentiometer and confirmed by pressing 

“s” display button depending on the set mode. The value can also be confirmed by pressing ENTER. 

• Energy value is recalculated using new set time. 

Grounding of the calibrator and the instrument to be calibrated in the P-E mode 

When calibrating the power and energy meters with separate voltage and current circuits, it is advisable 

to select GND U ON and GND I ON (both grounding methods on) on the M-140 calibrator. This 

setting will ground both the current and voltage output of the calibrator. 

If the instrument to be calibrated has electrically connected and not grounded current and voltage 

inputs, GND U ON and GND I OFF should be selected on the M-140 calibrator. 

If Lo and -I terminals on the calibrator are connected AND the same terminals are connected at the 

instrument to be calibrated, resulting voltage drop at the current cables can damage the relay which 

interconnects Lo and -I terminals with GND terminal in the calibrator. 

“Operating examples“ chapter provides more information concerning correct connection of powermeters and 

energy meters to the calibrator. 


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Uncertainty calculation of set power 

Uncertainty of set power displayed on the Accuracy line of the display is calculated according to the following 

formula: 

for active power d P = √ ( dU 2 + dI 2 + dPF 2 + 0.03 2 ) [%] 

for reactive power d P = √ ( dU 2 + dI 2 + dPF* 2 + 0.03 2 ) [%] 

for apparent power d P = √ ( dU 2 + dI 2 + 0.03 2 ) [%] 

where dP is the uncertainty of set power [%] 

dU is the uncertainty of set voltage [%] 

dI is the uncertainty of set current [%] 

dPF is the uncertainty of set PF (cosϕ) [%] 

dPF* is the uncertainty of set sinϕ [%] 

Generation of frequency 

The multifunction calibrator can generate several different voltage shapes with exact frequency, amplitude and 

duty cycle. The output signal is present at BNC coaxial connector FREQ located at the front panel. The signal is 

not present at any other output terminal. 

There are two frequency generation modes. The first mode (PWM) allows the generation of squarewave output 

signal with calibrated amplitude, frequency and duty cycle. Frequency range is up to 10 kHz. The second mode 

(HF) also provides squarewave output signal with very steep rising edge, typically less than 3 ns. 

PWM mode 

Frequency range: 

Voltage range: 

Signal shapes: 

HF mode 

Frequency range: 

Voltage range: 

Signal shapes: 

0.1 Hz to 100 kHz 

1 mV to 10 Vpp 

squarewave, negative PWM NEG – symmetrical PWM SYM – positive 

PWM POS 

0.1 Hz to 20 MHz 

5 V pk-pk 0, -10, -20, -30 dB 

symmetrical squarewave 

PWM mode can be used to calibrate the input sensitivity of oscilloscopes at frequencies up to 10 kHz. HF mode 

can be used to calibrate the time base of oscilloscopes. 

To switch between the modes, keep pressing “F” direct mode button. The display includes the symbols for 

currently selected mode (PWM or HF). 

Control in the frequency mode 

• Press F direct mode button. The calibrator switches to PWM mode. If HF mode is desired, press F button 

once more. The main data on the display is the frequency. 


* set frequency 

* relative deviation of frequency 

* signal amplitude (PWM mode ) or attenuation (HF mode) 

* duty cycle (PWM mode only) 

* signal shape: PWM NEG / POS / SYM (PWM mode only) 



• Set the frequency using numeric keyboard, cursor buttons or potentiometer. Output signal is not yet 

connected to the output terminals. The information section of the display shows the symbol 

which informs about the disconnection of output terminals... 

• Connect the object to be calibrated to FREQ terminal. 


• Red LED is lit above the OUTPUT terminals to indicate the connection of signal to the output connector. 

• Output signal with set frequency is present at the output connector. 

Note 

• “FREQ” connector must not be overloaded. In 100 mV to 10V voltage range, maximum load is 5 mA. 

In other voltage ranges, maximum load is 0.1mA. If the output is overloaded, the set value is not 

guaranteed. 

• The output is short-circuit proof. 

• The outer casing of the connector is electrically connected to the chassis of the calibrator. 


• Keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] symbols appear under the relative deviation 

value ∆% = xx.xxxx %. 

• The value can be set using numeric keyboard, potentiometer or cursor buttons. Confirm the value by 

pressing “%” display button or by pressing ENTER. 

Setting the amplitude 

Signal amplitude in Volts can only be set in PWM mode. 


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• Select the frequency mode and keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] symbols appear 

under the amplitude value (U = x.xxx V). 

• Set the value using numeric keyboard and confirm by pressing “V” display button or by pressing ENTER. 

Setting the attenuation 

Signal attenuation in dB can only be set in HF mode. Attenuation can be set in steps of (0, -10, -20, -30) dB. 


under the attenuation value (a = x.xxx dB). 

• Set the value using numeric keyboard and confirm by pressing dB display button or by pressing ENTER. If 

other than permitted value is set, the closest permitted value is used. 



Setting the duty cycle 

Duty cycle can only be set in PWM mode. 


under the duty cycle value (PWM = xx %). 

• Set the value using numeric keyboard, cursor buttons or potentiometer and confirm by pressing % display 

button or by pressing ENTER. 

Setting the signal shape 

Signal shape can only be set in PWM mode. 

• Keep pressing SHAPE display button to select desired signal shape NEG – negative, SYM – symmetrical, 

POS – positive. 

• Output signal of desired shape is connected to the output connector. 

Simulation of temperature sensors 

The multifunction calibrator can simulate resistance temperature sensors and thermocouples. When resistance 

temperature sensors are simulated, a simulated resistance corresponding to set temperature, sensor type and 

temperature scale is connected to Hi - Lo terminals. When thermocouples are simulated, a simulated voltage 

corresponding to set temperature, sensor type and temperature of cold end of thermocouple is connected to Hi - 

Lo terminals. 

Simulated values of temperature sensors are also available at the AUXILIARY connector. Thermocouple voltage 

is available at +U, -U terminals. Four-wire connection of resistance temperature sensors is provided by current 

terminals PTLI, PTHI and voltage terminals PTLU, PTHU. 140-41 cable adapter is recommended. 

Temperature setting range: 

Sensor types: 

Temperature scale: 

-250 to +1820 o C depending on simulated sensor type 

resistance temperature sensor Pt 1.385, Pt 1.392, Ni 

thermocouple K, N, R, S, B, J, T, E 

ITS 90, PTS 68 for resistance temperature sensors and thermocouples 

Switching between resistance temperature sensors and thermocouples 

• Press T button on the calibrator. The main value on the display is set temperature. The calibrator simulates a 

resistance temperature sensor. 

• Press T button on the calibrator once again. The calibrator simulates a thermocouple. 

Setting the temperature 

• Press T button on the calibrator. The main value on the display is set temperature. 


* main data of temperature in o C or K 

* sensor type thermocouples: K, N, R, S, B, J, T, E 


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resistance temperature sensors: Pt 1.385, Pt 1.392, Ni 

* 

* 

resistance at 0 o C labeled R0 (resistance temperature sensors only) 

cold junction temperature of thermocouple sensors labeled RJ 

* set value of relate deviation in %, labeled ∆T = xxxx.x °C (K) 

the information section shows: 

* temperature scale type 

* uncertainty of simulated temperature value of selected temperature sensor type 

• Set the main value of temperature using numeric keyboard, cursor buttons or potentiometer. Output 

terminals are disconnected, the information section of the display shows the symbol which shows that 

output terminals are disconnected. 

• Connect the object to be calibrated to Hi - Lo terminals. 


• Red LED is lit above the OUTPUT terminal to indicate that the output signal is connected to output 

terminals. The display shows the symbol of connected output terminals. 

Note 

• Load of output terminals is limited similarly to corresponding voltage or current ranges. 

• Output signals provided at Hi - Lo terminals and AUXILIARY connector are short-circuit proof. 

Switching between temperature sensor types 

• Keep pressing “TC type” or “RTD type” display button to select desired sensor type. 

• If resistance temperature sensors are selected, each press of the button selects Pt1.385, Pt1.392 or Ni 

resistance thermometer. The display shows current setting as Pt385 / Pt392 / Ni. 

• If thermocouples are selected, each press of the button selects K, N, R, S, B, J, T, E types. The display 

shows current setting as TC TYPE x, where x is the type of the thermocouple 



Entry of R0 coefficient for resistance temperature sensors 

For resistance temperature sensors, resistance at 0 o C labeled R0 can be set. The range is 20 Ω to 2kΩ for all 

types of resistance temperature sensors. 

• Select the resistance temperature sensor mode and keep pressing the center cursor button until 

[ _ _ _ _ _ _ _ ] symbols appear under the R0 coefficient value (R0 = xxxx Ω). 

• Set the value using numeric keyboard and confirm by pressing “ Ω” or “kΩ ” display button or 

by pressing ENTER. 

Note 

After the calibrator is switched on or before the first change of the coefficient, R0 is set to 100 Ω. This setting 

corresponds to Pt 100 resistance thermal sensor. 

Entry of cold junction temperature 

For thermocouples, the temperature of cold junction can be entered. The entry is performed by setting the RJ 

field in the auxiliary data section of the display. 

• Select the thermocouple mode and keep pressing the center cursor button until [ _ _ _ _ _ _ _ ] 

symbols appear under the (RJ = xxxx.x o C) value, if o C unit of measurement is used, or under 

(RJ = xxxx.x K) value, if K unit of measurement is used. 

• Set the value using numeric keyboard. 

• Confirm the value by pressing o C or K display button or by pressing ENTER. 


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Automatic compensation of cold junction temperature 

Automatic cold junction TC sensors compensation can be performed, when cable adapter Option 140-01 is used 

for simulating. Ambient temperature measured by in cable adapter mounted Pt1000 sensor is taken as 

temperature of cold junction. This automatic compensation is performed always, when measuring of ambient 

temperature is activated on display (push button INPUT ON, green led lights). When temperature measuring is 

not activated or cable adapter Option 140-01 is not connected, manual compensation only is available. Set value 

of RJ on the display to the appropriate ambient temperature to compensate manually influence of cold junction. 

Use of AUTOCAL function 

To remove the effects of short-term drift and thermal dependency of the simulation, AUTOCAL function can be 

used. It can only be activated in the calibration mode. Procedure is following: 

• Use a display button to enter the calibration menu. Enter the calibration code and confirm by pressing 

ENTER. 

• Use the cursor buttons or potentiometer to select the AUTOCAL function from the calibration menu. After 

the function is activated, only one option - OFFSET ACAL - is provided. Press SELECT display button to 

confirm the option. 

• Proceed according to the instructions provided on the display. Automatic calibration takes ca 8-10 minutes 

and prompts the user to short Hi-Lo circuits and then to disconnect them. 

• After the calibration, the calibrator remains in the calibration mode. Press EXIT display button to return to 

normal display. 

Do not connect anything to any terminals during the automatic calibration, with the exception of the prompt to 

short the Hi-Lo terminals. The procedure is described in “Calibration mode” chapter. 



Multimeter 

The calibrator includes a built-in multimeter which can measure many electrical and non-electrical values. 

Besides DC voltage and current, it can measure frequency, temperature and when external strain gauge sensors is 

connected, even other non-electrical values can be measured. The multimeter can only be connected through 

AUXILIARY connector. „Description of controls“ chapter lists the pins of the connector. 

The manufacturer recommends 140-41 cable adapter or Option 40 cable terminal to connect the multimeter. 140- 

41 cable adapter includes a fuse which protects the multimeter from current overload. 

The manufacturer does not recommend connection of multimeter inputs to 

calibrator outputs. 

Such connection can result in presence of high voltage at multimeter inputs, 

which can damage the multimeter. 

Basic menu 

• Multimeter setting menu can be opened by pressing the METER direct control button. After the button is 

pressed, SETUP METER menu opens, which allows to set-up the multimeter. Press EXIT display button to 

return to previous menu. 

• Press ∧ or ∨ cursor button to browse the menu options. Active option is always inverted. 

• The parameters of the active option can be changed if the respective function is allowed to be changed. Use 

UP, DOWN, CLR, NEXT and display buttons to change the parameters of the active option. 

• Multimeter parameters can also be set using the potentiometer. The potentiometer can be used either to 

browse the menu options or to change the value of the active option. Press the knob to switch between these 

modes. 

• Keep pressing EXIT display button to return to normal display when you are finished setting up the 

parameters. 


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When the multimeter is being set-up, measurement cannot be initiated. Measurement can only be initiated after 

the menu is left using the INPUT button. 

Function selection 

• Press METER direct control button and select FUNCTION option from the menu using cursor buttons. 

• Press UP, DOWN display buttons or use the potentiometer to select one of the following functions: 

* basic DC voltage range VDC 10 V 

* DC current mA DC 20 mA 

* small DC voltage range mV DC up to 2 V 

* four-wire resistance measuring range up to 2 kΩ 

* frequency up to 15 kHz 

* temperature measurement using thermocouples T TC 

* temperature measurement using resistance temperature sensors T RTD 

* measurement of strain gauges (pressure, force) SGS 

• By selection of the measurement function, some related options are automatically changed as well 

(measuring range, unit of measurement). 

• Press EXIT display button the close the function selection menu and to return to the basic display. 

Setting the measurement range 

• Press METER direct control button and select RANGE option from the menu using cursor buttons. 

• Press UP, DOWN display buttons or use the potentiometer to select the measurement range for selected 

function. Ranges of individual functions can be changed: 

* small DC voltages mV DC ranges: 20, 200, 2000 mV 

* temperature measurement using thermocouples T TC, types: K, N, R, S, B, J, T, E 

* temperature measurement using RTD sensors, types: Pt 1.385, Pt 1.392 

* setting of sensitivity of strain gauge sensors (pressure, force) SGS 

• After setting the range, use ∧ or ∨ cursor buttons to switch to the previous or next menu option. The same 

can be achieved using the potentiometer after pressing the knob. Press EXIT display button the close the 

range selection menu and to return to the basic display. 



Units of measurement 

Unit of measurement can be set for each measurement function. The unit of measurement is displayed along with 

the measured value on the display. The description of the unit of measurement can consist of up to 4 characters. 

• Press METER direct control button and select UNIT option from the menu using cursor buttons. 

• Press the knob of the potentiometer to display ∧ and ∨ symbols above the active character. 

• Press UP, DOWN display buttons or use the potentiometer to select desired character at the active position. 

• Press NEXT display button to move onto next character. 

• Press the knob of the potentiometer to complete the setting. 

• After the unit of measurement is selected, use ∧ or ∨ cursor buttons to move onto the next menu option. The 

same can be achieved using the potentiometer after pressing the knob. Press EXIT display button the close 

the range selection menu and to return to the basic display. 

If you want to reset the unit of measurement to original setting, press CLR display button. Original settings are 

listed below: 

* basic DC voltage range VDC V 

* DC current mA DC 20 mA mA 

* small DC voltages mV DC up to 100 mV mV 

* four-wire resistance measurement Ω 

* frequency up to 15 kHz Hz 

* temperature measurement using 

thermocouples °C 

* temperature measurement using resistive 

temperature sensors °C 

* measurement of strain gauge sensors mV/V 

Use of calculation formula 

Each function of the multimeter can display recalculated measured value. The value shown on the display is 

always calculated according to the formula: 


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where 

Y = A0 + A1*X + A2 * X 2 

X is the value measured by the multimeter 

Y is the value shown on the display 

Default setting of the coefficients is A0 = 0, A1 = 1, A2 = 0. This means that directly measured value is 

displayed on the display. If any other recalculation is required, enter the desired parameters. Parameter A0 must 

be of the same dimension as is in row UNIT. 

• Press METER direct control button and select A0 (A1, A2) option from the menu using cursor buttons. 

• Enter new value using numeric keyboard. 

• Confirm the value by pressing ENTER. 

• After setting the coefficients, use ∧ or ∨ cursor buttons to switch to the previous or next menu option. The 



If you want to reset a coefficient to original setting, press CLR display button. 

Each measurement function of the multimeter has its own independent set of coefficients. 

Setting function parameters 

Some measurement functions have additional parameters. When measuring the temperature using RTD sensors, 

R0 (resistance at 0 °C) can be set, when measuring the temperature using TC sensors, the temperature of cold 

junction can be set and when measuring using SGS sensors, supply voltage of the bridge can be set. 

Original settings are listed below: 

T RTD 

R0 = 100 Ω 

T TC RJ =23 °C 

SGS 

Voltage = 5 V 

The parameters can be changed as follows: 

• Press METER direct control button and select a function, then use cursor buttons to select the line which 

includes the function parameter. 

• Enter new value using numeric keyboard. 

• Confirm the value by pressing ENTER. 

• After setting the coefficients, use ∧ or ∨ cursor buttons to switch to the previous or next menu option. The 





Start of measurement 

To start a measurement: 

• Press INPUT direct control button in the basic state of the calibrator. 

• INPUT field on the display shows the measured value. The measurement is indicated by a green LED above 

the INPUT button. 

• Press INPUT button again to stop the measurement. The LED goes off and the input connectors are 

disconnected. 

The multimeter does not display uncertainty of measuring. If the input range is exceeded, OVERFLOW message 

is displayed. 

140-41 Cable adapter must be used to connect the signal. 

Zero function 

The multimeter has a zeroing function. It can be activated after the measurement was activated by pressing 

INPUT direct control button. Zeroing is performed by pressing METER direct control button. After the button is 

pressed, most recent value is stored and subtracted from all ongoing measured values. A “Zero” message appears 

on the right side of the display, indicating that this function is active. Press METER a second time to deactivate 

the Zeroing function. 

Multimeter’s menu can be entered only after the measurement is terminated by pressing INPUT button. 


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Zeroing function can be used e.g. to compensate the voltage drops at the cables, to suppress any remanent value 

of the signal etc. 

Overloading can damage the multimeter. 

Notes: 

* The current inputs of the multimeter are protected from current overloading by a fuse located in 140-41 

cable adapter. The fuse can be replaced after turning the cap of the fuse holder. The procedure is 

described in the adapter’s manual. 

* The multimeter can be used as a DC milivoltmeter with 20 mV, 200 mV, 2 V, 10 V ranges. The 

appropriate input terminals are PTHU and PTLU. 

* Maximum allowed voltage on the input terminals against ground terminal is 20 V. 

* Frequency measurement is possible up to 15 kHz. Input signal must be within 0.2 to 5 V range. 

squarewave or pulse shape of the input signal is expected. 



Simultaneous functions 

The multifunction calibrator allows simultaneous generation of calibrated signal along with measurement of 

another signal using the built-in multimeter. To use both parts of the calibrator simultaneously, cable adapters 

supplied by the manufacturer are necessary. 

When using the calibrator, the following states are possible; each state has its limitation, listed in the table. 

Method of use Limitation of output signals Limitation of multimeter’s 

function 

Method of connection 

1 No cable adapter is used. Calibrator’s output signals are not 

limited in any way and can be fully 

used. 

Calibrator’s output signals are 

available only at the terminals 

located at the front panel. 

The multimeter cannot be 

used. 

If the multimeter is activated, 

FAIL error message appears. 

2 The calibrator is used with 

140-01 cable adapter. 


140-41 designed for 

simultaneous measurement. 

OUTPUT 140-41 function is 

set to AUX 


140-41 designed for 

simultaneous measurement. 

OUTPUT 140-41 function is 

set to PANEL. 


Option 40 Canon – 2 banana 

cable end. 


Option 60 Canon – 4 banana 

cable end.. 

Calibrator’s output signals are not 


used. 



located at the cable adapter. 



located at the cable adapter; ranges 

are limited to: 

- DC voltage up to 20 V 

- DC current up to 20 mA 

- four-wire resistance 

measurement. 

Calibrator’s output signals are only 

available at the terminals located at 

the front panel in full ranges and 

can be fully used. 


available at the terminals of the 

cable adapter. 



used. 


available on the terminals located 

at the front panel. 



used. 


available at the terminals located at 

the front panel. 

The multimeter can only be 

used to measure the external 

temperature using a Pt100 

sensor built into the adapter. 

The multimeter can be used 

without limitations and in full 

ranges. 

SGS sensors can be 

connected. 

The multimeter can be used 

without limitations and in full 

ranges. 

SGS sensors cannot be 

connected 

The multimeter can be used in 

the following ranges: 

- DC voltage up to 12 V 

- DC voltage up to 25 mA 

- frequency up to 15 kHz. 

The multimeter can only be 

used in the following ranges: 

- temperature using TC 

sensors 

- temperature using RTD 

sensors 

- resistance up to 2 kOhm 

SGS sensors cannot be 

connected. 

140-01 cable adapter 

connected onto calibrator’s 

terminals. 



terminals. 

OUTPUT 140-41 AUX 



terminals. 

OUTPUT 140-41 PANEL 

Option 40 Cable, connected 

onto calibrator’s 

AUXILIARY connector. 

Option 60 cable end , 


AUXILIARY connector 


Option 70 Canon – 4 

terminals. 

Following output signals can be set 

only: 

- resistance in four-wire 

connection 

– resistance temperature sensor 

simulation in four-wire connection 

Multimeter cannot be used. 

If the multimeter is activated, 

FAIL error message appears. 

Cable adapter Option 70, 

installed on AUXILIARY 

connector. 

Output signals are available on 

adapter Option 70 only. 


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If current is drawn from +I and –I output terminals located at 140-41 cable adapter, +I and –I output terminals 

located at calibrator’s front panel must not be connected simultaneously. 

“Operating examples“ chapter provides examples of correct connection during simultaneous measurements. 



Tester 

The calibrator includes an application SW, which facilitates automated testing of regulators and transducers. 

Tester function combines the use of the calibrator as the source of precision signal with automatic change of 

output signal, while the response of the unit being tested is measured by the calibrator’s built-in multimeter. The 

calibrator is capable of subsequent processing of measured values, providing PASS/FAIL indication. 

Tester function comprises of performance of a programmed sequence of up to 10 steps. For each step, the type 

and value of output signal and the type and tolerance of input signal can be defined. If the input signal is not 

within the tolerance limit, the respective step of the test program is considered failed. The time between 

individual steps can be set as well. 

Basic menu 

• Press SETUP display button to enter the Tester mode. After the button is pressed, the bottom line of the 

display shows TESTER option. Press the respective display button to open the menu of test programs. 

• The menu includes a sequence number of the test program, date of creation and program name. 

• Use the cursor buttons or the knob of the potentiometer to select the desired test program. Press EXECUTE 

display button to execute the program or SELECT to edit the program. 

Execution of test program 

After EXECUTE display button is pressed to execute the test program, the calibrator displays a screen with set 

parameters of output signal and set configuration of the multimeter. The calibrator displays PROGRAM 

NUMBER and STEP information above the main output data when the test program runs. PROGRAM 

NUMBER xx, where xx can be 00 to 09, designates the test program which currently runs. STEP (max. 10) 

designates current step of the program. 


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After the test program concludes, the calibrator displays a table showing the results. The table includes the 

sequence number of each step, set output value of the calibrator, the value measured by the multimeter and the 

result of the respective test step (PASS/FAIL). 

Total number of failed steps is displayed above the table (xx ERRORS) along with the designation of performed 

test. 

After reviewing the results of the test, press EXIT display button to return to the previous level. The test can be 

interrupted by pressing CANCEL button. 

Programming the test 

Test procedures can be programmed after you select a procedure in the basic Tester menu and press SELECT 

display button. The calibrator displays a programming table. 

Two basic test parameters can be set: 

• definition of the type of input and output signals and the number of steps 

• numeric values for each step 



Setting the type of signals and the number of steps 

Type of output signal can be set using OUTPUT display button. Press the button repeatedly to select the signal 

which will be generated at the output terminals after the test program is executed. The following options are 

available: 

VDC – VAC – ADC – AAC – WDC – WAC – R – C – T RTD – T TC – F PWM – F HF 

Selected type of output signal is displayed in the header of the programming table, “Output” column. The values 

in the table change when the type of the output signal is changed. 

Type of measured signal (input) can be set using INPUT display button. Press the button repeatedly to select 

the signal which will be measured at the input terminals by the built-in multimeter after the test program is 

executed. The following options are available: 

V DC – mA DC – mV DC – R 4W – Freq – T TC – T RTD 

Explanation of symbols: 

V DC DC voltage measurement in 12 V range 

mA DC DC current measurement in 25 mA range 

mV DC DC voltage measurement in 20 mV to 2 V range(automatic range switching) 

R 4W four-wire measurement of resistance 

Freq measurement of frequency up to 15 kHz 

T TC measurement of temperature using thermocouple 

T RTD measurement of temperature using resistance temperature sensor 

If T TC or T RTD functions are used, the parameters set for the multimeter mode apply. The settings include the 

type of unit of measurement (K – °C), temperature scale (ITS68 – PTS90), sensor type, temperature of cold 

junction of thermocouple (RJ) and resistance at 0 °C. 

Selected type of input signal is displayed in the header of the programming table, “Input” column. The values in 

the table change when the type of the input signal is changed. 

Number of test steps can be set by pressing STEPS display button in the range 1 to 10. Set number of steps is 

displayed in the header of the programming table, “Steps” column. The number of the rows in the table changes 

when the number of steps is changed. You can select the lines in the table by pressing ∨, ∧ buttons or by turning 

the knob of the potentiometer. 

Setting the numeric values of the test 

After the type of output signal is selected, numeric values of individual steps can be set. The following 

parameters can be set for each step: 

1. Value of OUTPUT signal. The range valid for the respective output signal can be used. 

If DC voltage or DC current are programmed, only the voltage or current can be set, not the frequency. The 

calibrator uses the frequency which has been previously set for the respective output function. 

If PWM or HF frequency output is selected, only the frequency can be set. The calibrator uses the output 

voltage and duty cycle which has been previously set for the respective output function. 

If power output (W AC, W DC) is selected, only W can be selected. The calibrator uses constant voltage, 

power factor (phase) and frequency which have been previously set in power generation mode. Change of 

power set in the programming table is achieved by change of output current during the test. 

2. Lower tolerance limit of input value (LOW). The limit can be set within the selected range of the 

multimeter. 

3. Upper tolerance limit of input value (HIGH). The limit can be set within the selected range of the 

multimeter. 

4. Duration of each program step in seconds (TIME). Setting range is 0.5 to 100 s. 


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Programming of values is done as follows: 

• Select the value to be changed by cursor buttons or the knob of the potentiometer. 

• Enter the numeric value using the units of measurement displayed in the header of the table. 

• Confirm the entry by pressing ENTER. New entry is copied to the respective position. 

• This way, all numeric entries in the table can be changed. 

• Press EXIT display button to return to the previous level when the programming is complete. 

Note: 

When the test program is executed, all steps are performed. 

Within one test program, only one type of input signal and output signal can be used. It is impossible to switch to 

other function of the calibrator in the middle of a program. 

Setting the relays 

SWITCH POLARITY and SWITCH ACTIVITY items of SETUP MENU are used to set-up the relay. The 

following table lists the states of the relay depending on the values of SWITCH POLARITY, SWITCH 

ACTIVITY and the test result. 

SETUP MENU RELAY BEFORE TEST TEST RESULT RELYA AFTER TEST 

Switch polarity OFF disconnected FAIL disconnected 

Switch activity PASS PASS connected 

Switch polarity ON connected FAIL connected 

Switch activity PASS PASS disconnected 

Switch polarity OFF disconnected FAIL connected 

Switch activity FAIL PASS disconnected 

Switch polarity ON connected FAIL disconnected 

Switch activity FAIL PASS connected 



Setup menu 

The multifunction calibrator allows many other, less frequently used parameters to be set. Setup menu is used to 

set these parameters. Setup menu is opened by pressing SETUP display button. If output terminals are 

connected, they will be disconnected and the following display appears: 

Use ∧ or ∨ cursor button or the knob of the potentiometer to browse the menu options. Active option is always 

inverted and when changed, the descriptions of display buttons change as well. Display buttons show how the 

respective parameter can be set. Each parameter can be changed after the knob of the potentiometer is pressed. 

Press EXIT display button twice to save the parameters when the setting is completed. New settings are retained 

when the calibrator is switched off. Setup menu offers the following options: 

1. Coil x50 .... xx ON/OFF 

This parameter can be set on when 50-turn current coil is going to be used for clamp ammeter calibration. The 

coil multiplies the output current. OFF is set by the manufacturer. 

2. GND U .... xx ON/OFF 

This parameter connects Lo terminal to GND. In practice this means that Lo terminal is grounded. By pressing 

the display buttons, the terminal can be grounded or ungrounded. ON is set by the manufacturer, output terminal 

is grounded. 

3. GND I .... xx ON/OFF 

This parameter connects -I to GND. In practice this means that -I terminal is grounded. By pressing the display 

buttons, the terminal can be grounded or ungrounded. OFF is set by the manufacturer, output terminals are not 

grounded. 

It is recommended to ground only the voltage channel GND U ON, GND I OFF, for all ranges except the 

generation of power or energy. If the meter to be calibrated has Lo terminal grounded, it is recommended to 

unground both outputs of the calibrator, GND U OFF, GND I OFF to exclude ground loops. 

Note 


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If neither the calibrator’s output, nor the meter’s inputs are grounded, signal/noise ratio can arise at the 

calibrator’s output. 

4. Temp.scale .... xx ITS90/PTS68 

This parameter allows the temperature scale for platinum resistance temperature sensors to be selected. Pressing 

the display buttons allows to switch between ITS90 and PTS68 temperature scales. ITS90 is set by the 

manufacturer. 

5. Temp.unit .... xx 

o C/K 

This parameter allows the temperature unit for simulation of temperature sensors to be selected. Pressing the 

display buttons allows to switch between °C and K. °C is set by the manufacturer. 

6. Phase.unit .... xx 

o /cos 

This parameter allows the unit of phase shift between the voltage and current output to be selected in the 

power/energy generation mode. Pressing the display buttons allows to switch between ° and COS (degrees and 

power factor). 

7. Output 140-41 .... xx AUX/PANEL 

This parameter allows the output terminals to be selected. AUX means that the output signals are present only at 

the cable adapter’s terminals, PANEL means that the output signals are present only at the front panel. 

8. Meter average .... xx UP/DOWN 

Displays the number of measurements taken before the average value of build-in multimeter is displayed 

(integration constant). UP, DOWN display buttons can be used to select a value in the range of 1 to 20. The 

higher the value, the longer the calibrator needs to measure a value, but displayed value is more stable. If 20 is 

set, one measurement takes approximately 2.5 s. 

9. Interface .... xx GPIB/RS232 

Displays the type of interface used to control the calibrator from a PC. By pressing GPIB or RS232 buttons, the 

respective type can be selected. The calibrator can be remotely controlled only using the selected interface. 

10. GPIB address .... xx UP/DOWN 

Displays the calibrator’s address at the GPIB bus. UP, DOWN display buttons can be used to select any valid 

GBIP address in the range of 00 to 30. The address 02 is set by the manufacturer. 

11. RS232 baud rate .... xx UP/DOWN 

Indicates the communication speed of RS232 bus. UP/DOWN display buttons can be used to select 150, 300, 

600, 1200, 2400, 4800, 9600, 19200. Perfect communication with the PC requires equal values set at the PC and 

the calibrator. 

12. Handshake .... xx OFF/Xon-Xoff 

Indicates the communication handshake. Display buttons can be used to select OFF or Xon/Xoff. Perfect 

communication with the PC requires equal values set at the PC and the calibrator. 



13. Keyb.beep .... xx ON/OFF 

This parameter allows the acoustic indication of pressed buttons to be switched off or on. ON and OFF display 

buttons can be used to switch the indication off or on. ON is set by the manufacturer. 

This parameter does not control the acoustic indication of output voltages over 100 V and identification of 

errors. 

14. Keyb.volume .... xx UP/DOWN 

This parameter allows the volume of acoustic indication to be set. UP and DOWN display buttons allow to set 

the value in the range of 00 to 15. The bigger the value, the louder sound. This parameter controls the volume of 

keyboard beep (if switched on), indication of output voltages over 100 V and identification of errors when 

controlling the calibrator. 

15. Brightness .... xx UP/DOWN 

This parameter sets the contrast of the display. UP and DOWN display buttons allow to set the value in the range 

of 00 to 15. 

16. Rotary change .... xx ON/OFF 

This parameter controls the range of functions of the potentiometer. If ON is set, the potentiometer can move the 

cursor both to the left and right (← and → symbols) and up and down (∧ and ∨ symbols). If OFF is set, the 

potentiometer can move the cursor up and down only (∧ and ∨ symbols). 

17. Switch polarity .... xx ON/OFF 

This parameter controls the function of the built-in relay. If ON is set, the relay is closes before the test. If OFF is 

set, the relay is opens before the test. 

18. Switch activity .... xx PASS/FAIL 

This parameter controls the function of the built-in relay. If PASS is set, the relay is active (changes its status) if 

the test results in PASS status. If FAIL is set, the relay is active (changes its status) if the test results in FAIL 

status. 

19. Cal.code .... 00000 

Entry of calibration code. Calibration code is a five-digit number, which must be entered to access the calibration 

mode. If the calibration code is set to “00000”, this information is displayed in the Setup menu. Calibration code 

can be changed. New calibration code can be directly entered using numeric keyboard and confirmed by pressing 

ENTER. If non-zero calibration code is set, correct calibration code must be entered to access the calibration 

mode. Non-zero calibration code is not displayed further on the display. 


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The purpose of the calibration code is to prevent unauthorized users from changing the calibration of the 

instrument. 

Note 

It is advisable to write down actual calibration code if changed. If you forget the calibration code, you have to 

send the calibrator to the manufacturer. 

20. Cal.date .... xx.yyyy 

Displays the date of last calibration of the calibrator (month/year). The parameter cannot be changed, as it is 

automatically recorded when leaving the calibration mode. 

21. Serial No .... xxxxxx 

Displays the serial number of the calibrator. The parameter cannot be changed. 

22. Time .... xx:yy 

Displays real time. The parameter can be changed using HOUR UP, HOUR DO, MIN UP, MIN DO. display 

buttons. 

23. Date .... xx.yy.zzzz 

Displays real time. The parameter can be changed using DAY UP, MONTH UP, YEAR UP, YEAR DO display 

buttons. 

24. Time on display .... xx ON/OFF 

If set to ON, time and date are displayed in the upper part of the display. If OFF is set, time and date are not 

displayed. ON is set by the manufacturer. 



Calibration mode 

The multifunction calibrator includes a calibration procedure, which allows calibration of the calibrator. Zero 

point and slope of the characteristics of individual generation and measurement ranges are set during the 

calibration in predefined order. The calibration can only be controlled using the buttons and menu on the 

calibrator. 

The calibration mode includes AUTOCAL autocalibration function. This function can automatically correct the 

short-term instability of zero point for voltage ranges up to 20 V. This function is not a part of the complete 

calibration procedure, but it can be used to reduce the time and temperature dependent drift of zero point when 

calibrating using small DC voltages and when simulating the thermocouples. 

Calibration principles 

The calibrator can be calibrated: 

• completely, i.e. all functions are calibrated in all recommended points 

• partially, i.e. only selected functions are calibrated in all recommended points 

• partially, i.e. only selected functions are calibrated in selected points 

Complete calibration consists of all partial calibrations performed in the order defined by the calibration menu. If 

an item of the calibration menu, e.g. “VOLTAGE DC” is selected, it is not necessary to calibrate all ranges 

defined by the calibration algorithm. If new calibration of all ranges is not possible (e.g. the required standard is 

not available), old calibration data can be confirmed, i.e. current step of the calibration can be skipped. 

Calibration interruption can be performed in any point of the calibration 

procedure. However this particular calibration influences parameters of the 

calibrator. 

Accuracy of the calibrator is guaranteed when full calibration was done. 

DC voltage calibration is performed by setting the zero and slope of the scale in all ranges and in both signal 

polarities (+ and -) (except the 1000 V range, where zero correction is not necessary). 

AC voltage calibration is performed by setting the zero and slope of the scale in all ranges at 1000 Hz (except 

the 1000 V range, where the calibration is performed at 500 Hz). 

DC current calibration is performed by setting the zero and slope of the scale in all ranges and in both signal 

polarities (+ and -). 

AC current calibration is performed by setting the zero and slope of the scale in all ranges at 1000 Hz (except 

the 20 A, where the calibration is performed at 120 Hz). 

AC and DC power calibration is performed by calibration of DC and AC current. The phase relationship of 

voltage and current (power factor) is defined digitally and cannot be calibrated. It can only be checked. The 

respective check is not included in the calibration procedure. 

Resistance calibration is performed by setting the zero and slope of the scale in all ranges. Slope of each range is 

calibrated twice. In practice, 9 internal range resistances (50 Ω to 10 MΩ) must be measured and the measured 

value entered into the calibrator; then the zero point of the scale is adjusted for each range. Calibration of 

resistance ranges must be performed through AUXILIARY connector. Cable adapter Option 70 must be 

connected to the auxiliary output. 

Capacitance calibration is performed by setting the zero and slope of the scale in all ranges. Slope of each range 

is calibrated twice. In practice, 9 internal capacitance ranges (1 nF to 10 µF) must be measured and the measured 

value entered into the calibrator; then zero point of the scale is adjusted for each range. 


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Frequency function calibration is performed by calibration of DC voltage range and zero point check. DC 

voltage levels are checked, between which the calibrator switches when generating the signal. The accuracy of 

PWM of the squarewave output signal depends on the frequency accuracy and cannot be calibrated, it can only 

be checked. The respective check is not included in the calibration procedure. 

Multimeter is calibrated on voltage ranges 2 V and 10 VDC voltage ranges, on current range 20 mADC and on 

resistance range 2000 Ω. For calibration cable adapters Option 40 (voltage, current) and Option 60 (resistance) 

must be used. 

Access to the calibration procedure 

Calibration code is required to access the calibration procedure. 

• Press SETUP to open the setup menu. 

• Press CALIB display button. 

• Concerning cable adapters, access to the calibration mode is permitted without connected any of cable 

adapters or with connected cable adapter Option 40, Option 60 and Option 70. If cable adapter Option 140- 

01 or Option 140-41is connected to the AUXILIARY connector, access to calibration mode is not permitted. 

Calibrator will display message: 

Err 9 

Bad cable adapter ! 

• If an attempt is made to access the calibration procedure within 60 minutes after the calibrator was switched 

on, the calibrator does not open the respective menu and displays the following message instead: 

Err 21 

Time warm up ! 

xx minutes remain 

• If the calibrator is already on for at least 60 minutes, it requests the entry of the calibration code after CAL. 

MODE display button is pressed. 

• Enter the correct calibration code using numeric keyboard and press ENTER. 

• If incorrect calibration code is entered, an error message appears on the display for approximately 3 

seconds: 

Err 20 

Bad calib. code! 



• If correct calibration code is entered, calibration menu appears: 

• Use ∧ and ∨ cursor buttons to move the cursor through the list: 

1. VOLTAGE DC All DC voltage ranges calibration 

2. VOLTAGE AC All AC voltage ranges calibration 

3. CURRENT DC All DC current ranges calibration 

4. CURRENT AC All AC current ranges calibration 

5. POWER DC DC power calibration 

6. POWER AC AC power calibration 

7. RESISTANCE Resistance calibration 

8. CAPACITANCE Capacitance calibration 

9. FREQUENCY Amplitude in frequency mode calibration 

10. ANALOG INPUT Multimeter calibration 

11. AUTOCAL DC voltage offset correction 

Selection of calibration type 

After the calibration menu is displayed, one of partial calibrations can be selected. Use ∧ and ∨ cursor buttons to 

move the cursor through the list. Having selected the required function to be calibrated, press SELECT display 

button. The following data are shown (the following example is valid for VOLTAGE DC range): 

The table lists recommended calibration points. Having selected the required calibration point using SELECT 

display button, the following data are shown. 


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Display buttons have the following meaning: 

WRITE 

SKIP 

EXIT 

new calibration value is entered into the memory, old value is irreversibly lost 

current calibration step is skipped, old value is retained in the memory 

current calibration is terminated. After this button is pressed, the calibration memory 

hold all data (old or new entered) and the calibrator returns to the calibration 

menu. It is not necessary to calibrate all ranges; calibration of only selected ranges 

is possible by skipping the ranges which do not need to be calibrated. 

Moreover, the display shows the range which is being calibrated (RANGE), and the value to be set at the 

external standard multimeter (VALUE). 

Setting the new calibration data 

Use ∧, ∨, cursor buttons to set such main data on the display, when the output signal measured by external 

standard multimeter reaches the required calibration point. When the standard output value is reached, press 

“WRITE” to write new calibration value to the calibration memory. If you press “SKIP” button, the calibrator 

ignores the new value and old value is retained. After you press “WRITE” (or “SKIP”), the calibrator moves on 

to the next calibration point. 

The procedure is repeated for all calibration points of the selected function. If you press “EXIT” button before 

completing the calibration, the calibrator returns to the calibration menu. 

Termination of calibration 

The calibration can be terminated in the following cases: 

• complete calibration has been performed, new calibration data have been entered, the program has returned 

to the calibration menu, 

• calibration of selected function has been performed, new calibration data have been entered, the program 

has returned to the calibration menu, 

• calibration of selected range(s) of selected function has been performed, new calibration data have been 

entered, the program has returned to the calibration menu, 

• the calibration has been started but no calibration data have been entered, the program has returned to the 

calibration menu after “EXIT” display button has been pressed, 



Press “EXIT” display button to terminate the calibration. After the button is pressed, the calibration date is saved 

internally and the calibrator returns to the state it was in before the calibration has been started. 

Calibration points 

Each function of the calibrator has assigned fixed calibration points which have to be set during the calibration. 

For VOLTAGE DC, VOLTAGE AC, CURRENT DC, CURRENT AC, POWER AC, POWER DC, F functions, 

the signal value is set using the keyboard. For R-C functions and partially also during the calibration of the 

multimeter, calibration data of the range resistances must be entered. T function does not require any calibration, 

as the output voltage or resistance is based on arithmetic interpolation using standard tables of temperature 

sensor values. 

The calibrator needs no calibration of the following parameters: 

• frequency 

• phase relationship (power factor) of output voltage and frequency in AC power/energy generation 

mode 

• DC and AC power (except DC and AC current in this mode) 


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VOLTAGE DC function 

nominal value [V] set limits [V] range [V] note 

0.0 2 u 20 m zero calibration 

0.0 2 u -20 m zero calibration 

19 m 4 u 20 m slope calibration 

-19 m 4 u -20 m slope calibration 


0.0 2 u -200m zero calibration 


-190 m 6 u -200m slope calibration 

0.0 5 u 2 zero calibration 

0.0 5 u -2 zero calibration 

1.9 12 u 2 slope calibration 

-1.9 12 u -2 slope calibration 



19 100 u 20 slope calibration 

-19 100 u -20 slope calibration 





1000 20 m 1000 slope calibration 

-1000 20 m -1000 slope calibration 

Table DC VOLTAGE 

VOLTAGE AC function 

nominal value [V] set limits [V] range [V] recommended frequency[Hz] 

1.9 m 5 u 20 m 1000 

19 m 10 u 20 m 1000 

19 m 15 u 200 m 1000 

190 m 40 u 200 m 1000 

190 m 30 u 2 1000 

1.9 100 u 2 1000 

1.9 200 u 20 1000 

19 1 m 20 1000 

19 5 m 200 1000 

190 10 m 200 1000 

190 50 m 1000 1000 

750 50 m 1000 500 

Table AC VOLTAGE 

Other then recommended frequencies can be used for calibration. Specification of the calibrator is valid when 

recommended frequency is used. 



CURRENT DC function 

nominal value [A] set limits [A] range [A] note 

0.0 3 n 200 u zero calibration 

0.0 3 n -200 u zero calibration 

190 u 5 n 200 u slope calibration 

190 u 5 n -200 u slope calibration 

0.0 20 n 2 m zero calibration 

0.0 20 n -2 m zero calibration 

1.9 m 50 n 2 m slope calibration 

1.9 m 50 n -2 m slope calibration 



19 m 200 n 20 m slope calibration 

-19m 200 n -20 m slope calibration 













Table DC CURRENT 

CURRENT AC function 

nominal value [A] set limits [A] range [A] recommended frequency[Hz] 

19 u 5 n 200 u 1000 

190 u 50 n 200 u 1000 

190u 40 n 2 m 1000 

1.9 m 200 n 2 m 1000 

1.9 m 200 n 20 m 1000 

19 m 2 u 20 m 1000 

19 m 2 u 200 m 1000 

190 m 20 u 200 m 1000 

190 m 20 u 2 500 

1.9 200 u 2 500 

1.9 1 m 20 120 

10 3 m 20 120 

Table AC CURRENT 

Other then recommended frequency can be used for calibration. Specification of the calibrator is valid when 



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POWER DC function 

DC current calibration 

nominal value [A] set limits [A] range [A] note 




-19m 2 u -20 m slope calibration 












-10 1 m -10 slope calibration 

Table DC POWER 

POWER AC function 

AC current calibration 

nominal value [A] set limits [A] range [A] recommended frequency[Hz] 

1.9 m 400 n 20 m 120 

19 m 2 u 20 m 120 

19 m 2 u 200 m 120 

190 m 20 u 200 m 120 

190 m 20 u 2 120 

1.9 200 u 2 120 

1.9 200 u 10 120 

10 1 m 10 120 

Table AC POWER 

Other then recommended frequency can be used for calibration. Specification of the calibrator is valid when 




RESISTANCE function 

nominal value [Ω] set limits [Ω] range [Ω] 

Table R 

10 0.01 10 – 50 

0 0.005 10 – 50 

20 0.005 10 – 50 

50 0.005 50 - 100 

20 0.005 50 - 100 

100 0.01 50 - 100 

200 0.01 100 – 400 

100 0.01 100 – 400 

400 0.03 100 – 400 

1 k 0.02 400 – 2 k 

400 0.02 400 – 2 k 

2 k 0.06 400 – 2 k 

5 k 0.1 2 k – 10 k 

2 k 0.1 2 k – 10 k 

10 k 0.3 2 k – 10 k 

20 k 1 10 k – 40 k 

10 k 1 10 k – 40 k 

40 k 3 10 k – 40 k 

100 k 3 40 k – 200 k 

40 k 3 40 k – 200 k 

200 k 10 40 k – 200 k 

500 k 20 200 k – 1 M 

200 k 20 200 k – 1M 

1 M 100 200 k – 1M 

2 M 200 1M – 4 M 

1 M 200 1M – 4 M 

4 M 1 k 1M – 4 M 

10 M 2 k 4 M – 20 M 

4 M 2 k 4 M – 20 M 

20 M 10 k 4 M – 20 M 

20 M 20 k 20M – 50 M 

50 M 50 k 20M – 50 M 

For resistance mode calibration, cable adapter Option 70 or Option 140-41 must be used. Connect standard 

multimeter to the four output terminals on the currently connected cable adapter. 


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CAPACITANCE function 

nominal value [F] set limits [F] range [F] 

1 n 5 p 900 p – 2.5 n 

900 p 5 p 900 p – 2.5 n 

2.5 n 5 p 900 p – 2.5 n 

5 n 5 p 5 n - 10 n 

2.5 n 5 p 5 n - 10 n 

10 n 10 p 5 n - 10 n 

20 n 10 p 10 n - 50 n 

10 n 10 p 10 n - 50 n 

50 n 50 p 10 n - 50 n 

100 n 50 p 50 n - 250 n 

50 n 50 p 50 n - 250 n 

250 n 250 p 50 n - 250 n 

500 n 250 p 250 n – 1 u 

250 n 250 p 250 n – 1 u 

1 u 1 n 250 n – 1 u 

2 u 2 n 1 u – 2.5 u 

1 u 2 n 1 u – 2.5 u 

2.5 u 5 n 1 u – 2.5 u 

5 u 5 n 2.5 u – 10 u 

2.5 u 5 n 2.5 u – 10 u 

10 u 20 n 2.5 u – 10 u 

20 u 20 n 10 u – 50 u 

10 u 20 n 10 u – 50 u 

50 u 200 n 10 u – 50 u 

Table C 

FREQUENCY function 

amplitude calibration 

nominal value [V] set limits [V] range [V] note 

Table F 

0.0 10 u -- zero calibration 


ANALOG INPUT multimeter function 

voltage, current, resistance calibration 

nominal value [-] set limits [-] range [-] note 

0 V 50 u 10 V zero calibration 

10 V 200 u 10 V slope calibration 

0 mA 50 nA 20 mA zero calibration 

19 mA 500 nA 20 mA slope calibration 

0 Ω 5 mΩ 200 Ω zero calibration 

100 Ω 5 mΩ 200 Ω slope calibration 

0 Ω 50 mΩ 2000 Ω zero calibration 

1000 Ω 50 mΩ 2 kΩ slope calibration 

0 mV 2 u 20 mV zero calibration 

19 mV 2 u 20 mV slope calibration 

0 mV 7 u 200 mV zero calibration 

190 mV 7 u 200 mV slope calibration 

0 mV 50 u 2 V zero calibration 

1.9 V 50 u 2 V slope calibration 

Table Multimetr 

For calibration of ranges 2, 10 V and 20 mA cable adapter Option 40 must be used. For calibration of resistance 

ranges cable adapter Option 60 is necessary. 



Full calibration procedure 

Following pages describe procedure of the full calibration. 

Required instruments: 

Following instruments are required for calibration: 

• 81/2 digit multimeter type Agilent HP3458A or Fluke 8508A or other type with accuracy 0.001 % on DC 

voltage 

• Resistance shunt 10 mΩ, 100 mΩ Burster 1280, or other type with accuracy 0.01% 

• Resistance standard 100 Ω, 1000 Ω Burster 1228, 1229, or other type with accuracy 0.005% 

• RLC meter BM 595, HP 4263A, HP4278A, ESI 2150, or other with accuracy 0.1 % 

• Counter HP 53181A, HO 53130, BM 642 or other with accuracy 0,001 % 

• Powermeter 0.02- 0.05 % 

HP8903A Distortion analyzer and scope with bandwidth min. 20 MHz are recommended for THD measuring of 

AC signals. 

Calibration procedure 

1. Connect the calibrator and the multimeter to the mains and let them switched on for at least three hours 

in a laboratory at 23±1 o C. 

2. Press SETUP display button to call up the setup menu and then CALIB display button to call up the 

calibration menu. 

3. Enter the calibration code and press ENTER (default calibration code is “00000”). 

4. DC voltage ranges calibration 

a) Connect the voltage input terminals of the multimeter to the Hi - Lo output terminals of the 

calibrator. 

b) Select VOLTAGE DC from the calibration menu and confirm by pressing SELECT button. 

Switch M-140 output terminals ON. 

c) Follow the instructions provided on the calibrator’s display and the DCU table to adjust the 

calibrator’s output in the calibration points. 

d) To adjust the calibrator’s output in the calibration points, press SELECT button and use , 

∨, ∧ cursor buttons or potentiometer to adjust output voltage. Confirm correctly set value by 

pressing WRITE display button. If you want to skip the calibration point whose calibration you 

have already entered, press SKIP display button. 

e) Switch output terminals OFF 

5. AC voltage ranges calibration 

a) Select VOLTAGE AC from the calibration menu and confirm by pressing SELECT button. 

Switch M-140 output terminals ON. 

b) Follow the instructions provided on the calibrator’s display and the ACU table to adjust the 



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c) To adjust the calibrator’s output in the calibration points, press SELECT button and use , 

∨, ∧ cursor buttons or potentiometer to adjust the output voltage. Confirm correctly set value 

by pressing WRITE display button. If you want to skip the calibration point whose calibration 

you have already entered, press SKIP display button. 

d) Switch output terminals OFF. Disconnect multimeter and calibrator. 

6. DC current ranges calibration 

a) Connect current input terminals of the multimeter to the +I - -I output terminals of the 

calibrator. Select CURRENT DC from the calibration menu. 

b) Select DC current measurement range on external multimeter. Switch output terminals ON 

c) Follow the instructions provided on the calibrator’s display and the DCI table to adjust the 


d) To adjust the calibrator’s output in the calibration points, press SELECT button and use , 

∨, ∧ cursor buttons or potentiometer to adjust the output current. Confirm correctly set value 



e) Resistance shunt should be used on 2A, 20 A ranges, if standard multimeter does not cover this 

range. 

7. AC current ranges calibration 

a) Select CURRENT AC from the calibration menu. Set the same function on external 

multimeter. 

b) Follow the instructions provided on the calibrator’s display and the ACI table to adjust the 


c) To adjust the calibrator’s output in the calibration points, press SELECT button and use , 

∨, ∧ cursor buttons or potentiometer to adjust the output current. Confirm correctly set value 



d) Resistance shunt should be used on 2A, 20 A ranges, if standard multimeter does not cover this 

range. 

8. DC power ranges calibration 

a) DC power ranges calibration is performed by calibrating 20 mA, 200 mA, 2 A, 10 A DC 

current ranges. There is no need to calibrate voltage ranges. 

b) Select POWER DC from the calibration menu. 

c) Connect a standard ammeter to calibrator’s output terminals +I - -I. 

ATTENTION 

Calibrator’s Lo and -I terminals are electrically connected. 



d) Follow the instructions provided on the calibrator’s display and the POWER DC table to adjust 

the calibrator’s output in the calibration points. 

e) To adjust the calibrator’s output in the calibration points, press SELECT button and use , 


by pressing WRITE display button. 

f) Shunt should be used on 2A, 10 A ranges. 

9. AC power ranges calibration 

a) DC power ranges calibration is performed by calibrating 20 mA, 200 mA, 2 A, 10 A AC 

current ranges. There is no need to calibrate the voltage ranges. 

b) Select POWER DC from the calibration menu. 

c) Connect a standard ammeter to calibrator’s output terminals +I - -I 

d) Follow the instructions provided on the calibrator’s display and the POWER AC table to adjust 

the calibrator’s output in the calibration points. 

e) To adjust the calibrator’s output in the calibration points, press SELECT button and use , 


by pressing WRITE display button.. 

f) Shunt should be used in 2A, 20 A ranges. 

10. Resistance ranges calibration 

Resistance ranges calibration is performed by both calibration methods, i.e. setting the checked value 

and measuring this value with the standard instrument, as well as setting the nominal value of the 

calibrator’s measurement range on the external multimeter by adjusting the calibrator’s output. If the 

entry of measured value to the calibrator is required, VALUE METER is displayed at the respective 

calibration point. The value on the calibrator’s display has the same format as the nominal value of the 

respective calibration point on the display. If, on the other hand, the user is requested to adjust the 

calibrator’s output to set the nominal value of the calibrator’s measurement range on the external 

multimeter, VALUE is displayed at the respective calibration point. The value on the calibrator’s 

display has general format. 

a) The calibrator have to be calibrated with attached adapter Option 70, in four-wire connection. 

Connect adapter to the AUXILIARY connector. Select RESISTANCE from the calibration 

menu 

b) Select four-wire resistance measurement function on the external multimeter. Adjust the zero 

value of the external multimeter including the cables, if necessary. 

c) Connect all four wires of adapter Option 70 to the input terminals of external multimeter. Use 

four wire technique. Connect correct terminals and wires. 

d) Measure the resistance in the recommended calibration points using the multimeter and write 

the values into the calibrator. Use numeric keyboard, potentiometer or cursor buttons to enter 

the value. 

e) Perform the adjustment for all calibration points as usual. Press WRITE display button to 

confirm correct values. 

f) Disconnect adapter Option 70 from AUXILIARY connector. 


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11. Capacitance ranges calibration 

Capacitance ranges calibration is performed by both calibration methods, i.e. setting the checked value 

and measuring this value with the standard instrument, as well as setting the nominal value of the 

calibrator’s measurement range on the external multimeter by adjusting the calibrator’s output. If the 

entry of measured value to the calibrator is required, VALUE METER is displayed at the respective 

calibration point. The value on the calibrator’s display has the same format as the nominal value of the 

respective calibration point. If, on the other hand, the user is requested to adjust the calibrator’s output 

to set the nominal value of the calibrator’s measurement range on the external multimeter, VALUE is 

displayed at the respective calibration point. The value on the calibrator’s display has general format. 

a) Select CAPACITANCE from the calibration menu. Select GND U OFF and GND I OFF from 

the setup menu. 

b) Adjust the values of shorted and open terminals of the external RLC meter, set the frequency 

used during the measurement (1000 Hz for 1 nF to 10 nF range, 100 Hz for 10 nF to 10 uF 

ranges). Connect Hi, Hu terminals to calibrator’s Lo output and Li, Lu terminals to calibrator’s 

Hi output. 

c) Measure the capacitance of internal range capacitors using the RLC meter and write the values 

into the calibrator. The procedure is the same as when calibrating the resistance ranges. 

d) Perform the adjustment for all calibration points as usual. Press WRITE display button to 

confirm correct values. 



11. Amplitude calibration in frequency mode 

a) Select FREQUENCY in the calibration menu. 

b) Connect the external multimeter with DC voltage measurement range selected to calibrator’s 

Hi - Lo output terminals. 

c) Follow the instructions provided on the calibrator’s display and the F table to adjust the 

calibrator’s output in the calibration points. To adjust the calibrator’s output in the calibration 

points, use , ∨, ∧ cursor buttons to adjust the output value. Confirm correctly set value by 

pressing WRITE display button. 

d) When calibrating the amplitude of the frequency generation function, DC voltage 

corresponding to the amplitude of output squarewave signal is set. 

12. Built-in multimeter calibration 

Built-in multimeter calibration consists of the calibration of 20 mV, 200 mV, 2V and 10 V voltage 

ranges, one 20 mA current range and 200 Ω and 2 kΩ resistance ranges. 

Cable adapters Option 40 – two-wire adapter, and Option 60 – four-wire adapter are necessary to 

connect the multimeter. 

Due to the fact that the precision of the built-in multimeter is comparable to the precision of the 

calibrator in resistance, small voltage and current ranges, external calibrator of higher precision class 

should be used to calibrate the built-in multimeter. If external calibrator is not available, the calibrator 

can be used to calibrate the built-in multimeter, but it has to be taken into account the fact that the 

precision of the calibration can be insufficient. An 81/2 digit multimeter is recommended for 

calibration. 

a) 10 V DC voltage range calibration 

• Connect adapter Option 40 to the AUXILIARY connector on the front panel. 

• Select ANALOG INPUT from the calibration menu. Press SELECT display button to select 

the first calibration point, 0 mV. 

• Make short on adapter Option 40. 

• After the value stabilizes, press WRITE display button to write new calibration value. 

• Connect input voltage terminals of external multimeter to Hi – Lo output terminals of the 

calibrator. You can use test wires, which are part of basic delivery. Connect Option 40 H input 

wire of adapter Option 40 to the Hi output or the calibrator and L input wire of adapter Option 

40 to the Lo output on the calibrator. If necessary, adjust the zero point of the external 

multimeter before connecting the cables (internal and external multimeters are in parallel). 

• Press SELECT display button to select 10 V calibration point. Red light is lighting, all 

terminals on calibrator are automatically ON. 

• “ Output = xx.xxxxxx V “ is displayed in the bottom part of the display, showing the set value 

of output voltage. This value can be changed using the potentiometer or cursor button. 

• Adjust the calibrator’s output voltage so that the external multimeter shows 10.0000 V 

• After the value stabilizes, press WRITE display button to write new calibration value. If 

calibration in this point is not required, press SKIP. Terminals of multimeter will switch OFF. 

• Disconnect both the external and built-in multimeter. 


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b) 20 mA DC current range calibration 

• Leave input terminals of Option 70 adapter OPEN. 

• Make short on calibrator output terminals +I - -I. 

• Press SELECT display button to select the first calibration point, 0 mA. 

• After the value stabilizes, press WRITE display button to write new calibration zero value. 

• Disconnect short on +I - -I terminals. Connect L input wire of adapter Option 40 to the -I 

output on the calibrator, H input wire of adapter to the minus current input on standard 

multimeter and +I output terminal of the calibrator to the positive current input of standard 

multimeter. Calibrator current output, input of the internal multimeter and current input of 

standard multimeter are connected in series. If necessary, adjust the zero point of the external 

multimeter before calibrating current range. 

• Press SELECT display button to select calibration point, 19 mA. Red LED is lit above 

OUTPUT button. 

Note: 

It can occur, that calibrator beeps and display error message. In this case push the 

button OUTPUT ON to switch calibrator output manually. 

• Adjust the calibrator’s output current so that the external multimeter shows 19.0000 mA. After 

the value stabilizes, press WRITE display button to write new calibration value. Terminals of 

multimeter will switch OFF. 

• Disconnect both the external and built-in multimeter. Disconnect cable adapter Option 40 from 

the AUXILIARY connector. 

c) 100 Ω resistance range calibration 

Calibration of both ranges 100 and 1000 Ω consists of following steps: 

• 0 Ω calibration 

• resistance range of multimeter calibration 

For calibration of resistance ranges external standard 100 Ω and 1000 Ω are required. 

Connect to the AUXILIARY connector cable adapter Option 60. 

0 Ω calibration 

• Make short of all four Option 60 input wires. 

• Press SELECT display button to select the first calibration point, 0 Ω. 



• Connect resistance standard 100 Ω to the input terminals. Use four-wire technique. 

• Press SELECT display button to select the second calibration point, 100 Ω. 

• After the value stabilizes, write calibration value of resistance standard to the lower line and 

confirm by pressing WRITE. 

d) 1000 Ω resistance range calibration 

• Make short of all four Option 60 input wires. 

• Press SELECT display button to select the first calibration point, 0 Ω. 



• Connect resistance standard 1000 Ω to the input terminals. Use four-wire technique. 

• Press SELECT display button to select the second calibration point, 1000 Ω. 



• After the value stabilizes, write calibration value of resistance standard to the lower line and 

confirm by pressing WRITE. 

e) 20 mV voltage range calibration 

• Make short of test wires of Option 60 adapter. 

• Press SELECT display button to select the first calibration point of 20 mV range, 0 mV. 


• Connect external standard multimeter set to the mVDC function to the Hi – Lo output 

terminals. Use test wires from basic delivery. Connect HU test wire of cable adapter to the Hi 

terminal on the calibrator and LU test wire of cable adapter to the Lo terminal on the 

calibrator. Both build-in meter and external multimeter are in parallel. If necessary, adjust zero 

of standard multimeter before calibration. 

• Press SELECT display button to select 19 mV calibration point. Red LED is lit above 


• Set such output voltage on the calibrator, that standard multimeter indicates 19.000 mV 


Terminals of the calibrator will switch OFF automatically. 

• Disconnect input wires of Option 60. 

f) 200 mV voltage range calibration 















g) 2000 mV voltage range calibration 












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i) Exit the calibration mode. 

AUTOCAL function 

To remove the effects of short-term drift and thermal dependency of the simulation, AUTOCAL function can be 

used. It can only be activated in the calibration mode. 

Use of AUTOCAL function influences the zero value of DC voltage generated by the calibrator. Use of the 

function is recommended only after the calibrator reaches the operating temperature. 

Procedure: 

• Use a display button to enter the calibration mode. Enter the calibration code and confirm by pressing 

ENTER. 

• Use the cursor buttons or potentiometer to select the AUTOCAL function from the calibration menu. After 

the function is activated, only one option - OFFSET ACAL - is provided. Press SELECT display button to 

confirm the option. 

• The calibration includes two steps. During the first step, Hi-Lo terminals must be shorted. Use a short cable 

to connect the terminals. During the second step, the calibrator requests the disconnection of Hi-Lo 

terminals. Follow the instructions provided on the display: 

- when requested to do so, short calibrator’s Hi-Lo terminals. Press NEXT display button. 

- the calibrator performs internal measurement for ca 30 seconds. During this period, progress 

information is displayed in the bottom part of the display. 

- after the measurement completes, the calibrator requests the disconnection of Hi-Lo terminals. 

Disconnect the cable and confirm by pressing NEXT display button. 

- the calibrator performs internal measurement of voltage ranges for ca 8 minutes. During this period, 

progress information is displayed in the bottom part of the display. 

- after the measurement completes, the calibrator returns to the calibration mode. 

- press EXIT display button to return to normal state. 

• Do not connect any terminals during the calibration procedure, with the exception of requested short of Hi- 

Lo terminals. 



Error messages 

If an error occurs during the calibrator’s operation or control, error message is displayed on the display. Errors 

can be caused by: 

• incorrect control using the front panel, i.e. attempts to force a prohibited mode, e.g. setting an out-of-range 

value, overloading of output terminals etc., 

• fault of the calibrator, e.g. internal communication error during the communication between individual 

functional blocks, 

• incorrect control using the GPIB or RS-232 bus. 

Below you can see a sample error message which appears when too large value is attempted to set up. All error 

messages are displayed in the center of the display. 

The following table lists all error messages, their meaning and simple troubleshooting. 


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No 

error 

label description troubleshooting 

01 Overload 2V ! 2V range overloaded Output current is too high. Increase load resistance. 

02 Overload 20V ! 20 V range overloaded Output current is too high. Increase load resistance. 

03 Overload 200V ! 200, 1000 V ranges 

overloaded 

Output current is too high. Increase load resistance. 

04 Overload I output ! Current output overloaded Voltage on the load is too high. Decrease load resistance. 

05 High temperature ! Too high internal 

temperature 

Output stages are overloaded. Do not use ranges 200V, 1000V or 

20 A for at least 10 minutes. Check if the ventilation holes are 

free. 

06 Overload RC ! RC simulator overloaded Test current is too high. Use lower range of tested Ohmmeter. 

07 FBK error ! Internal error Turn off the calibrator and turn on it again. 

08 OUTPUT must be 

in OFF state ! 

Cable adapter tried to be 

exchanged while output 

terminals was ON 

10 Interface error ! GPIB communication error Wrong data format on GPIB. 

Switch off output terminals with button OUTPUT, change the 

adapter, and switch output terminals on. 

11 Bad command ! Bad command of GPIB Not known command on GPIB. 

12 Bad 

communication ! 

13 Over range ! Overcrossing the range via 

GPIB 

GPIB communication error Listener not connected to the GPIB. Check correct connection of 

GPIB cable. 

Value out of range was set via GPIB. Set correct value. 

20 Bad calib. code ! Bad calibration code Wrong calibration code was entered, calibration cannot start. 

Enter correct calibration code. 

21 Time warm up ! Attempt to start calibration 

before warm up 

24 Cable adapter must 

be off ! 

Adapter isn’t allowed for 

autocalibration 

25 Use cable adapter ! Attempt to start calibration 

without cable adapter. 

30 Internal RxD 

timeout ! 

31 Internal 

communication ! 

37 Calibrator is not 

ready ! 

40 Value too large ! Maximum value is out of 

limit 

41 Value too small ! Minimum value is out of 

limit 

42 Deviation too large 

! 

Attempt to start calibration before 60 minutes warm up period. 

Let the calibrator turned on for at least 60 minutes. 

Use another cable adapter or perform autocalibration procedure 

without cable adapter. 

Calibration of resistance ranges can be performed with adapter 

Option 70. Calibration of internal multimeter can be performed 

with cable adapters Option 40 and Option 60. 

Internal error Internal error of the calibrator. Turn the calibrator off and after 5 

s turn on. If the error will appear again, contact manufacturer. 





Deviation is too high 

44 Unable +/- ! Change of polarity is not 

allowed 

45 Unable – polarity ! Negative polarity is not 

allowed. 

46 Unable DC/AC ! DC/AC conversion is not 

possible 

47 Current timeout 

! 

48 Not allowed on 

AUX output ! 

Time limit for current over 

10 A exceeded 

Function cannot be used on 

output AUXILIARY 

Attempt to set value over possible range. Set correct value. 

Attempt to set value under possible range. Set correct value. 

Set deviation is out of limit –30% to +30%. Set correct value. 

Attempt to change polarity, where it is not allowed.. Concerned 

modes F, P-E, R-C, ACV, ACI. 

Attempt to set negative polarity, where it is not allowed.. 

Concerned modes F, P-E, R-C, ACV, ACI. 

Attempt to change parameter AC/DC where it is nonsense or 

where it is not allowed. 

Long-term loading current terminals with output current over A. 

Do not use this setting in combination with connected cable 

adapter. 



Functional description of the calibrator 

Basic blocks 

Basic functional blocks are: 

• front panel keyboard 

• LCD display 

• output terminals 

• output voltage amplifier 200 V 

• output voltage amplifier 20 A 

• main board 

• voltage amplifier 2 V 

• voltage amplifier 20 V 

• DC reference voltage with DAC 

• generator 

• feedback circuits 

• phase shift circuits 

• current ranges generator 

• multimeter 

• power line transformer 

• power supply board 

• interface GPIB and RS232 


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75


2, 20 V DC voltage ranges 

The functional scheme is shown in the picture below: 

There is a DC reference voltage source integrated within the 22bit measurement converter. Its output is fed to the 

output stage for 2 and 20 V range. Output voltage present at Hi and Lo terminals is sensed by sensing wires. 

Feedback eliminates the influence of amplifier’s output impedance and of the resistance of wires within the 

calibrator. 

200 V DC voltage range 

The block diagram functional scheme is shown in the picture below. 

The scheme is similar to 2 and 20 V ranges. A 240 V power amplifier with electronic fuses is connected to the 

output of 20 V amplifier. 

2 to 200 V AC voltage ranges 

The functional scheme is shown in the picture below: 


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The calibrator’s built-in generator generates a sine wave with voltage-controlled amplitude. The frequency is 

derived from microprocessor control circuit’s crystal oscillator. The signal is fed to 20 V or 200 V amplifier and 

then to output terminals. Feedback circuits sense the voltage present at the output terminals, normalize its value 

and detects it. This results in a signal corresponding to average value of the output voltage. This signal is further 

filtered and compared to the set value of output voltage. The error value controls the amplitude of the generator’s 

output. 

20mV and 200 mV voltage ranges 

20 mV and 200 mV voltage ranges are derived from 2 and 20 V voltage ranges. 

The output of the amplifier is fed to an inverting attentuator with 1:100 nominal division ratio. The signal is then 

led to the output terminals, sensed via local feedback. This connection allows to load the calibrator output with 

output current of several mA without losing accuracy. 

1000 V AC, DC voltage range 

The highest voltage range of the calibrator uses 200 V amplifier. It is connected to a pair of transformers with ca 

1:6 transformation ratio. 

In 1000 V AC mode, the output of 200 V amplifier is transformed and led to the output terminals. The output 

voltage is sensed, rectified and compared to reference DC voltage provided by the DA converter. error value 

controls the amplitude of the generator’s output so that there is correct voltage at the output terminals. 

In 1000 V DC mode, 12 kHz signal is transformed, rectified, filtered and led to the output terminals. The output 

voltage is sensed equally to 1000 V AC mode. 



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Current converter 

The current converter and current amplifier form a separate design block based on a transconductivity converter 

with 10 -5 S nominal conversion ratio. 

A six-range switched current amplifier connects to the output of the current converter. 

input 

power stage 

Its input is fitted with overload protection and a separate circuit which measures the shift between output voltage 

and current in 2 and 20 A current ranges. The output stage is push-pull in B class. 

Resistance and capacitance simulator 

Resistance and capacitance are simulated using electronic simulator. 

DA convertor 

power stage 

The Hi and Lo terminals are calibrator’s output terminals. The stage including U1 operating amplifier converts 

voltage to current. U2 is a separation amplifier. R1 to R5 and C1 to C3 are range impedance. DA converter has 0 

to +1 and 0 to -1 conversion ration and allows the simulation of resistance and capacitance values different from 

the range impedances. The output stage increases the permitted current load of the output. 

ATTENTION 

78 

The simulator’s output voltage (Hi - Lo terminals) is limited to 8 Vpk. 


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Frequency synthesizer 

Frequency synthesis circuitry allows fine setting of frequency in the whole calibrator’s range. Frequency 

synthesis uses DSP circuits with basic frequency 20 MHz. 

Power and energy mode 

In the power/energy mode, the calibrator supplies the set voltage to Hi-Lo terminals and the set current through 

+I – -I terminals. Both signals have defined phase shift according to the set power factor, if AC mode is set. 

Output voltage is obtained from 200 V AC voltage range. Output current is obtained from 2 or 20 A current 

range. The output current generator is independent of the output voltage generator and synchronized by the 

microprocessor’s crystal oscillator. There is a phase shift between the signals of the output current generator and 

output voltage generator according to the set power factor. The phase of output current and voltage is compared 

by a phase comparator and compared to a reference value representing the set power factor; the output drives a 

voltage-controlled phase shift element, which controls the phase of output current. 



Calibrator’s maintenance 

The multifunction calibrator is electronic instrument with microprocessor control. All blocks which are heavily 

loaded during the operation are cooled by a fan. 

Rules for correct operation 

Especially the following rules should be adhered to guarantee correct operation of the calibrator: 

• The calibrator can only be switched on and off by pressing the mains switch located at the rear panel. 

• Do not connect the calibrator to other voltage than set by the voltage selector. 

• Do not block the vent openings located at the rear panel and bottom panel. 

• The calibrator must not be operated in dusty environment. It was designed to be used in a laboratory. 

• No liquid or small objects can be permitted to enter the calibrator through the vent openings.. 

• Do not switch the calibrator outside its operating temperature range. 

• Connect the instruments to be calibrated to proper output terminals. There is no way of protecting the 

calibrator from the damage caused by some improper connections. 

• Do not damage the output terminals by plugging in “bananas” thicker than the terminals were designed 

for. 

• Whenever possible, use the setup menu to ground Lo output terminal (GND U ON setup function). 

• Do not overload the power stages by leaving the calibrator switched on with the load connected for a long 

time, especially on 20 A current range and 200V and 1000 V voltage ranges. 

• If the instruments to be calibrated are not connected to calibrator’s output terminals using original cables, 

ensure that cables suitable for the calibration voltage and current are used. Maximum output voltage can 

reach 1000 V AC and the maximum output current can reach 20 A AC. 

Regular maintenance 

The calibrator does not require any special maintenance of electrical or mechanical parts. If is gets dirty, the case 

and the display can be cleaned by a wool rag moistened with alcohol. 

The calibrator should be calibrated in the recommended 12-month intervals. A calibration center should perform 

the calibration. 

What to do in case of failure 

If an obvious failure occurs during the operation (e.g. the display is not lit, the fan is not turning), the calibrator 

must be switched off immediately. First, check the fuse located in the power cord receptacle. Procedure is 

following: 

• Remove the end of power cord from the mains connector at the rear panel. 

• Insert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pry out the fuse 

holder. 

• Remove the fuse. Replace it with new fuse of the same rating if the fuse was broken. 


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• Replace the fuse holder, reconnect the power cord and switch on the calibrator. If the problem persists, 

contact the manufacturer. 

If an obvious fault is evidenced, e.g. a measurement range or an operating mode is not functional, the user cannot 

correct the fault. Contact the manufacturer. 

Hidden faults can cause different symptoms and be caused by different causes. Usually, they cause instability of 

some parameter. Hidden defects can be caused by unacceptable distortion, degraded insulation etc. In this case 

contact the manufacturer. 

Sometimes it seems that the calibrator has hidden defect, when the rules for correct operation are not adhered to. 

In this case, the fault is caused by the operator. Most frequent cases of false “hidden defects”: 

• mains voltage out of tolerance limits or unstable 

• wrong grounding of the measurement circuit (bad connection of the ground terminal of the mains outlet, or 

several ground connection when grounding loops are formed) 

• proximity to sources of intensive influence, whose products are spread through the mains or propagated by 

the electromagnetic field 

• strong electrostatic or electromagnetic field which can cause major instability during calibration using higher 

impedance. 



Verification test 

Procedure recommended for verifying parameters of the calibrator is described in this chapter. During tests it is 

not necessary access to the interior of the instrument. 

Required equipment 

Following instruments are required for performance verification test: 

• 81/2 digit multimeter type Agilent HP3458A or Fluke 8508A or other type with accuracy 0.001 % on DC 

voltage 

• resistance shunt 10 mΩ, 100 mΩ Burster 1280, or other type with accuracy 0.01% 

• RLC meter BM 595, HP 4263A, HP4278A, ESI 2150, or other with accuracy 0.1 % 

• counter HP 53181A, HO 53130, BM 642 or other with accuracy 0,001 % 

• powermeter 0.02- 0.05 % like Zimmer LMG95, Yokogawa 

• resistance standard 100 Ohm, 1000 Ohm with accuracy 0.005% 

HP8903A Distortion analyzer and scope with bandwidth min. 20 MHz are recommended for THD measuring of 

AC signals. 

Configuration of the calibrator 

Calibrator should be tested directly from the front panel terminals and without use of terminal adapter 140-01 or 

140-41. For build-in multimeter testing cable adapters Option 40 and Option 60 are recommended. To suppress 

influence of noise or interference with power line frequency in measuring circuit it is recommended following 

setting of the calibrator (in SETUP MENU): 

• Coil x50 OFF 

• GND U ON (in capacitance test OFF) 

• GND I ON (in capacitance test OFF) 

Note: 

It is recommended to ground only the voltage channel GND U ON, GND I OFF, for all ranges 

except the generation of power or energy. If the meter to be calibrated has Lo terminal 

grounded, it is recommended to un-ground both outputs of the calibrator, GND U OFF, GND I 

OFF to exclude ground loops. 

• Meter average 05 

If it is grounded neither calibrator nor standard meter, higher level can occur on the output 

terminals. 

In general, when calibrator is connected to the standard meter, ground loops can be arise 

through power line connection. Ground loops can result apparently worse noise, short term 

stability or non-harmonic distortion of output signal. If necessary use toroidal chokes to 

suppress this products. 

In all other items in SETUP MENU the setting of parameters don’t influence accuracy of the calibrator. 

Use sin waveform of the output signal on all AC tests. 

Performance verification may be performed after warm-up period i.e. 1 hour after switching on. Calibrator have 

to be in temperature stabilize condition at minimum 8 hours before performance verification test is started. 


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Basic steps of the performance verification test 

Verification procedure consists of following steps: 

• 20 V DC voltage test with linearity check 

• DC voltage internal ranges 20 mV, 200 mV, 2 V, 240 V, 1000 V test 

• 20 V AC voltage test with linearity check 

• AC voltage internal ranges 20 mV, 200 mV, 2 V, 20V, 240 V, 1000 V test 

• 200 mA DC current test with linearity check 

• DC current internal ranges 200 uA, 2 mA, 20 mA test 

• AC current internal ranges 200 uA, 2 mA, 20 mA, 200 mA test 

• AC/DC high current ranges 2 A, 20 A test 

• AC/DC power 480VA 2400VA (AC power with PF 0, +0.5, -0.5) test 

• Resistance test in points 10, 100, 1k, 10k, 100k, 1M, 10M, 50M Ohm on DC 

• Capacitance test in points 1n, 10n, 100n, 1u, 10u, 50u F on frequency 1000 Hz 

• Frequency nominal value 1 kHz test 

• Multimeter internal ranges 20 mVDC, 200 mVDC, 2 VDC, 10VDC, 25mADC, 200 Ohm, 2 kOhm, 

frequency 1 kHz test 

• Distortion checking of AC voltage, range 20 V. 

Procedure 

Following part describes procedure of performance verification test. Recommended measuring points are the 

same as the points in table of limits (see tables bellow). 

1. Connect the calibrator to the mains and let them switched on for at least one hour in a laboratory at 23±1 o C. 

2. Perform ACAL procedure (see chapter Calibration mode). 

3. Connect voltage input of the standard multimeter to the voltage output terminals of the calibrator. Set 

appropriate parameters on the standard multimeter to achieve its best accuracy. 

4. Perform 20 VDC linearity, DC voltage, 20 VAC linearity, AC voltage tests according to the tables I, II, III, 

IV. Deviations should not exceed specified limits. 

5. Connect current input of standard multimeter to the current output terminals of the calibrator. Set 

appropriate parameters on the standard multimeter to meet its best accuracy. 

6. Perform 200 mADC linearity, DC current, AC current tests according to the tables V, VI, VII. Deviations 

should not exceed specified limits. 

7. Connect current output terminals of the calibrator to the current terminals of resistance shunt 100 mOhm. 

Connect voltage input of standard multimeter to the voltage terminals of the resistance shunt. Set range 100 

(200)mV on standard multimeter. 

8. Perform AC/DC high current test on range 2 A according to the table VIII. Deviation should not exceed 

specified limit. 

9. Connect current output terminals of the calibrator to the current terminals of resistance shunt 10 mOhm. 

Connect voltage input of standard multimeter to the voltage terminals of the resistance shunt. Set range 100 

(200)mV on standard multimeter. 



10. Perform AC/DC high current test on range 20 A according to the table VIII. Deviation should not exceed 

specified limit. 

11. Connect standard powermeter to the appropriate output and current terminals of the calibrator. 

12. Perform AC/DC power test according to the table IX. Deviations should not exceed specified limits. 

13. Connect voltage terminals of the calibrator to the Hi/Lo and Sense H/L terminals respectively of the 

standard multimeter. Set resistance mode on multimeter and calibrator as well. Use four-wire technique for 

connection of multimeter for testing on nominal values bellow 10 kOhm. Use autozero function of standard 

multimeter to eliminate thermoelectric voltages and residual resistances of multimeter and cables before 

measuring. 

14. Connect adapter Option 70 to the AUXILIARY connector. Perform resistance test according to the table X. 

Deviations should not exceed specified limits. 

15. Connect voltage terminals of the calibrator to the RCL meter. Switch GND U and GND I OFF in SETUP 

MENU (In common RCL meters measuring circuit must not be grounded). Connect source terminal of RCL 

meter to the Lo output terminal of the calibrator. 

16. Perform capacitance test according to the table XI. Deviations should not exceed specified limits. 

17. Connect output voltage terminals of the calibrator to the counter. Set output voltage 1 VAC, frequency 1 

kHz. 

18. Perform frequency test according to the table XII. Deviation should not exceed specified limit. 

19. Connect Option 40 cable adapter to the auxiliary connector on the front panel. Connect Lo banana of the 

adapter to the Lo output terminal on the calibrator. Connect Hi banana of the adapter to the Hi output 

terminal on the calibrator. Set appropriate value of frequency and DC voltage range 20V on the calibrator 

(frequency and 10 V DC range on build in meter) according to the table XIII. 

20. Perform multimeter test in points FREQUENCY 1000Hz and 10 VDCV. Deviations should not exceed 

limits in the tables bellow. 

Note : 

Because accuracy of calibrator output is not accurate enough in all points, use external 

standard counter (frequency) or multimeter (DC voltage) connected in parallel to the output 

terminals to obtain exact value on the output. 

21. Connect Option 40 cable adapter to the +I, -I output terminals of the calibrator. Set appropriate value of 

output DC current. 

22. Perform multimeter test on range 25 mA DC, i.e. point 19 mA DC (see table of limits) according to the table 

XIII. Deviation should not exceed specified limit. 

23. Connect Option 60 cable adapter to the auxiliary connector on the front panel. Set in SETUP MENU of 

build-in meter function DC voltage, range 2V. Connect together Hu and Lu terminals (banana) of the 

adapter to make short and use ZERO function of the meter to reset zero point of the meter. 

24. Connect terminal Hu of the adapter with output terminal Hi on calibrator. Connect terminal Lu of the 

adapter with output terminal Li on the calibrator. 

25. Set appropriate values of DC voltage on the calibrator according to the table XIII and perform test of meter 

DC voltage ranges 20mV, 200mV and 2V. Deviation should not exceed specified limit. 

Note : 

Because accuracy of calibrator output is not accurate enough in all points, use external 

standard multimeter connected in parallel to the output terminals to obtain exact value of DC 

voltage on the output terminals. 

26. Disconnect Option 60 from output terminals Hi, Li. Set resistance function in SETUP MENU of build-in 

meter. Make four-wire short on the Option 60 banana terminals. Use ZERO function of the build-in meter to 

exclude parameters of the adapter. Connect standard resistor 100 Ohm to the adapter. Use four-terminal 

technique. 

27. Perform multimeter test on resistance range 200 Ohm according to the table XIII. Deviation should not 

exceed specified limit. 

28. Use the same procedure to test resistance range 2000 Ohm. 


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29. Disconnect cable adapter Option 60 and connect distortion meter to the voltage output terminals of the 

calibrator. Set output voltage 10 VAC, frequency 1000 Hz and sin waveform. 

30. Check harmonic distortion of output signal. It should not exceed 0.05%. 

If calibrator is out of limits is in some points of this test, appropriate function and range should be recalibrated. It 

is not necessary to recalibrate all functions, but only this one, which does not meet specification. See chapter 

Calibration mode, where recalibration procedure is described. 



Tables of limits 

20 V DC Basic range with linearity test 

Function Range Value (V) Frequency (Hz) Deviation 

allowed(%value) 

V-DC 20.0 V 2.0 0.008 

V-DC 20.0 V 4.0 0.006 

V-DC 20.0 V 6.0 0.005 

V-DC 20.0 V 8.0 0.004 

V-DC 20.0 V 10.0 0.004 

V-DC 20.0 V 12.0 0.004 

V-DC 20.0 V 14.0 0.004 

V-DC 20.0 V 16.0 0.004 

V-DC 20.0 V 18.0 0.004 

V-DC 20.0 V 19.0 0.004 

V-DC 20.0 V -2.0 0.008 

V-DC 20.0 V -4.0 0.006 

V-DC 20.0 V -6.0 0.005 

V-DC 20.0 V -8.0 0.004 

V-DC 20.0 V -10.0 0.004 

V-DC 20.0 V -12.0 0.004 

V-DC 20.0 V -14.0 0.004 

V-DC 20.0 V -16.0 0.004 

V-DC 20.0 V -18.0 0.004 

V-DC 20.0 V -19.0 0.004 

Table I 

DC voltage test 



V-DC 2.0 V 1.9 0.004 

V-DC 2.0 V -1.9 0.004 

V-DC 240.0 V 190.0 0.004 

V-DC 240.0 V 240.0 0.003 

V-DC 240.0 V -190.0 0.004 

V-DC 240.0 V -240.0 0.003 

V-DC 1000.0 V 1000.0 0.010 

V-DC 1000.0 V -1000.0 0.010 

Table II 

20 V AC Basic range with linearity test 



V-AC 20.0 V 2.0 1000 0.075 

V-AC 20.0 V 4.0 1000 0.050 

V-AC 20.0 V 6.0 1000 0.042 

V-AC 20.0 V 8.0 1000 0.037 

V-AC 20.0 V 10.0 1000 0.035 

V-AC 20.0 V 12.0 1000 0.033 

V-AC 20.0 V 14.0 1000 0.032 

V-AC 20.0 V 16.0 1000 0.031 

V-AC 20.0 V 18.0 1000 0.031 

V-AC 20.0 V 19.0 1000 0.030 

Table III 


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AC voltage test 



V-AC 20 mV 0.019 1000 0.358 

V-AC 200 mV 0.19 1000 0.142 

V-AC 2.0 V 1.9 1000 0.030 

V-AC 20.0 V 19.0 50 0.030 

V-AC 20.0 V 19.0 120 0.030 

V-AC 20.0 V 19.0 10000 0.030 

V-AC 20.0 V 19.0 20000 0.082 

V-AC 20.0 V 19.0 50000 0.082 

V-AC 240.0 V 190.0 1000 0.036 

V-AC 1000 V 750.0 120 0.057 

Table IV 

200 mA DC Basic range with linearity test 

Function Range Value (A) Frequency (Hz) Deviation 


A-DC 200.0 mA 0.02 0.040 

A-DC 200.0 mA 0.04 0.025 

A-DC 200.0 mA 0.06 0.020 

A-DC 200.0 mA 0.08 0.018 

A-DC 200.0 mA 0.10 0.016 

A-DC 200.0 mA 0.12 0.015 

A-DC 200.0 mA 0.14 0.014 

A-DC 200.0 mA 0.16 0.014 

A-DC 200.0 mA 0.18 0.013 

A-DC 200.0 mA 0.19 0.013 

A-DC 200.0 mA -0.02 0.040 

A-DC 200.0 mA -0.04 0.025 

A-DC 200.0 mA -0.06 0.020 

A-DC 200.0 mA -0.08 0.018 

A-DC 200.0 mA -0.10 0.016 

A-DC 200.0 mA -0.12 0.015 

A-DC 200.0 mA -0.14 0.014 

A-DC 200.0 mA -0.16 0.014 

A-DC 200.0 mA -0.18 0.013 

A-DC 200.0 mA -0.19 0.013 

Table V 

DC current test 



A-DC 200.0 uA 0.00019 0.061 

A-DC 200.0 uA -0.00019 0.061 

A-DC 2.0 mA 0.0019 0.025 

A-DC 2.0 mA -0.0019 0.025 

A-DC 20.0 mA 0.019 0.013 

A-DC 20.0 mA -0.019 0.013 

Table VI 



AC current test 



A-AC 200.0 uA 0.00019 60 0.161 

A-AC 2.0 mA 0.0019 60 0.081 

A-AC 20.0 mA 0.019 60 0.055 

A-AC 20.0 mA 0.019 120 0.055 

A-AC 20.0 mA 0.019 1000 0.055 

A-AC 20.0 mA 0.019 1000 0.055 

A-AC 200.0 mA 0.19 60 0.055 

Table VII 

AC/DC high current test 



A-DC 2.0 A 1.0 0.025 

A-DC 2.0 A -1.0 0.025 

A-AC 2.0 A 1.0 60 0.060 

A-DC 10.0 A 10.0 0.040 

A-DC 10.0 A -10.0 0.040 

A-AC 10.0 A 10.0 60 0.160 

Table VIII 

AC/DC power test 

Function Range Value (VA) Frequency (Hz) Deviation 


P 1 480W 480 60 0.07 

P 0,5LA 480W 240 60 0.46 

P 0,5LE 480W 240 60 0.46 

P 1 2400W 2400 60 0.14 

P 0,5LA 2400W 1200 60 0.77 

P 0,5LE 2400W 1200 60 0.77 

Table IX 

Voltage = 240V 

Resistance test 

Function Range Value (Ohm) Frequency (Hz) Deviation 


O-4W 100.0 Ohm 10.0 DC 0.130 

O-4W 100.0 Ohm 100.0 DC 0.015 

O-4W 1000 Ohm 1000.0 DC 0.015 

O-4W 10k Ohm 10000.0000 DC 0.015 

O-4W 100k Ohm 100000.0000 DC 0.015 

O-4W 1M Ohm 1.000000e+6 DC 0.050 

O-4W 10M Ohm 1.000000e+7 DC 0.200 

O-4W 50M Ohm 5.000000e+7 DC 0.500 

Table X 

Capacitance test 

Function Range Value (F) Frequency (Hz) Deviation 


CAP 1 nF 1.00000e-09 1000 2.000 

CAP 10 nF 1.000000e-8 1000 0.500 

CAP 100 nF 1.000000e-7 1000 0.500 

CAP 1 uF 1.000000e-6 500 0.500 

CAP 10 uF 1.000000e-5 300 1.500 

CAP 50 uF 5.000000e-5 300 2.000 

Table XI 


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Frequency test 

Function Range Value (Hz) Frequency (Hz) Deviation 


FREQ 1 kHz 1000.0 0.005 

Table XII 

Multimeter test 

Function Range Value (Hz) Frequency (Hz) Deviation 


FREQ 1 kHz 1000.0 Hz 0.005 

V-DC 10 V 10.0 V 0.013 

V-DC 10 V -10.0 V 0.013 

A-DC 25 mA 0.019 A 0.017 

A-DC 25 mA -0.019 A 0.017 

V-DC 20 mV 0.019 V 0.057 

V-DC 20 mV -0.019 V 0.057 

V-DC 200 mV 0.19 V 0.024 

V-DC 200 mV -0.19 V 0.024 

V-DC 2 V 1.9 V 0.020 

V-DC 2 V -1.9 V 0.020 

O-4W 200 Ohm 100.0 Ohm 0.030 

O-4W 2 kOhm 1000.0 Ohm 0.021 

Table XIII 



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System control 

The calibrator includes standardized IEEE-488 bus and RS232 serial line. System connectors are located at the 

rear panel. For the remote control to work properly, bus parameters must be set in the system menu. For IEEE- 

488 bus, address is important (0 to 30 setting range). For RS232 bus, communication speed can be set (150 to 

19200 Bd) and software handshake XON/XOFF can be set. The calibrator can be only controlled by one 

interface at a time. It is therefore necessary to select one of the interfaces (GPIB/RS232) using the system menu. 

IEEE-488 bus properties 

The instrument performs the following functions based on GPIB bus commands: 

SH1, AH1, T5, L3, RL1, DC1, SR1 

The instrument also recognizes the following general commands: 

DCL 

SDC 

EOI 

GTL 

LLO 

SPD 

SPE 

Device Clear 

Selected Device Clear 

End or Identify Message Terminator 

Go To Local 

Local Lock Out 

Serial Poll Disable 

Serial Poll Enable 

RS232 bus properties 

To transfer the data using RS232 bus, 8N1 data format is used, i.e. each data word includes 8 bits, no parity and 

one stop bit. The communication speed can be set using the system menu. Available values: 150, 300, 600, 1200, 

2400, 4800, 9600 and 19200 Bd. Software handshake (communication control) XON/XOFF can be set to control 

the transfer of the data through the bus. 

RS-232 connector layout 

9-pin connector D-SUB FEMALE 

Pin Label Direction Note 

2 

3 

5 

TXD output transmitter 

RXD input receiver 

GND - ground 

Cable between the calibrator and PC (configuration 1:1) 

PC 

D-Sub 1 D-Sub 2 M-140 

Receiver 

Transmitter 

Ground 

2 

3 

5 

2 

3 

5 

Transmitter 

Receiver 

Ground 

90 


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Command syntax 

The commands described in this chapter can be issued through both buses (IEEE-488 and RS232). 

All commands listed in this chapter are explained in two columns: 

KEYWORD and PARAMETERS. 

KEYWORD column includes the name of the command. Each command includes one or more keywords. If a 

keyword is in brackets ( [ ] ), it is not mandatory. Non-mandatory commands are used only to achieve 

compatibility with language standard SCPI. 

Capitals designate the abbreviated form of the commands; extended form is written in lowercase. 

Command parameters are in brackets (); each parameter is separated using a comma. Parameters in brackets ( 

[ ] ) are not mandatory. Line ( | ) means “or” and is used to separate several alternative parameters. 

Semicolon ‘;’ is used to separate more commands written on one line. 

E.g. VOLT 2.5 ; OUTP ON 

Note: 

Each command must end in or . Both codes can be used at the same time. The calibrator 

performs all commands written on one line of the program after it receives , or code. Without 

this code, the program line is ignored. 

Description of abbreviations 

= Decimal Numeric Program Data, this format is used to express decimal number with or without the 

exponent. 

= 

Character Program Data. Usually, it represents a group of alternative character parameters. E.g. 

{ON | OFF | 0 | 1}. 

? = A flag indicating a request for the value of the parameter specified by the command. No other 

parameter than the question mark can be used. 

(?) = A flag indicating a request for the parameter specified by the command. This command permits a 

value to be set as well as requested. 

= 

= 

carriage return. ASCII code 13. This code executes the program line. 

line feed. ASCII code 10. This code executes the program line. 

OUTPut subsystem 

This subsystem allows to control the output terminals of M140 calibrator, to activate the four-wire output or to 

switch the calibrator to x50 current coil (option 130-50, 140-50). 

Keyword 

Parameters 

OUTPut 

[:STATe] (?) { ON | OFF | 0 | 1 } 

: ISELection (?) { HIGHi | HI50turn } 

OUTP [:STAT] (?) { ON | OFF | 0 | 1 } 

This command activates or deactivates the output of M140 calibrator. 

• ON or 1 - activates the output 

• OFF or 0 - deactivates the output 

If query is sent, M140 returns ON if the output is active or OFF if it is inactive 



Example: 

OUTP 1 - activates the output 

OUTP ? - the calibrator returns ON or OFF 

OUTP :ISEL (?) { HIGH | HI50 } 

This command activates or deactivates the 1000A current range (using a 50-turn coil). 

• HIGH - deactivates the 50-turn coil 

• HI50 - activates the 50-turn coil (up to 1000A range) 

If query is sent, M140 returns HIGH if the 50-turn coil is deactivated or HI50 if it is activated. 

Example: 

OUTP :ISEL HI50 activates the 50-turn coil 

OUTP :ISEL ? the calibrator returns HIGH or HI50 

SOURce subsystem 

This subsystem allows to control the individual functions of M140 calibrator. 

Keyword 

Parameters 

[SOURce] 

: FUNCtion 

[: SHAPe] (?) { DC | SINusoid | PULPositive | PULSymmetrical | 

PULNegative | RMPA | RMPB | TRIangle | LIMSinusoid | 

PWMPositive | PWMSymmetrical | PWMNegative | . 

SQUare } 

: VOLTage 

[: LEVEl] 

[: IMMediate] 

[: AMPLitude] (?) 

: CURRent 

[: LEVEl] 

[: IMMediate] 


: RESistance 

[: LEVEl] 

[: IMMediate] 


: CAPacitance 

[: LEVEl] 

[: IMMediate] 


: POWEr 

[: LEVEl] 

[: IMMediate] 


: PHASe 

: UNITS (?) { DEG | COS } 

[: ADJust] (?) 

: VOLTage 

[: LEVEl] 

[: IMMediate] 


: CURRent 

[: LEVEl] 

[: IMMediate] 



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: EARTh 

: VOLTage (?) { ON | OFF | 0 | 1 } 

: CURRent (?) { ON | OFF | 0 | 1 } 

: AUXiliary (?) { ON | OFF | 0 | 1 } 

: ADAPter (?) 

: FREQuency 

[: CW ] (?) 

: DUTY (?) 

: VOLT (?) 

: ATTE (?) 

: TEMPerature 

: UNITs (?) { C | CEL | K } 

: SCALe (?) { TS68 | TS90 } 

: THERmocouple 

[: LEVEl] 

[: IMMediate] 


: RJUNction (?) 

: TYPE (?) { B | E | J | K | N | R | S | T } 

: PRT 

[: LEVEl] 

[: IMMediate] 


: TYPE (?) { PT385 | PT392 | NI } 

: NRESistance (?) 

[SOUR] :FUNC [:SHAP] (?) { DC | SIN | PULP | PULS | PULN | RMPA | RMPB | 

TRI | LIMS | PWMP | PWMS | PWMN | SQU } 

This command sets the shape of the output signal. At the same time, the respective function must be set. E.g. for 

:VOLT or :CURR function, FUNC DC, FUNC SIN, or other signal shape must be set. Some functions (:RES, 

:CAP) do not require any other settings. 

• DC sets a DC output signal for voltage, current or power modes. 

• SINusoid sets AC output signal for voltage, current or power modes. 

• PULPositive sets AC squarewave signal for voltage or current modes. The amplitude and duty cycle can be 

set. The rectangles are positive, i.e. switching between 0 and +amplitude. 

• PULSymmetrical sets AC squarewave signal for voltage or current modes. The amplitude and duty cycle 

can be set. The rectangles are symmetrical, i.e. switching between -amplitude and +amplitude. 

• PULNegative sets AC squarewave signal for voltage or current modes. The amplitude and duty cycle can 

be set. The rectangles are negative, i.e. switching between –amplitude and 0. 

• RMPA sets AC output signal - ramp shape - for voltage or current modes. The amplitude can be set. -The 

output switches between -amplitude a +amplitude. 

• RMPB sets AC output signal - ramp shape - for voltage or current modes. The amplitude can be set. -The 

output switches between -amplitude a +amplitude. 

• TRIangel sets AC output signal - triangular shape - for voltage or current modes. The amplitude can be set. 

-The output switches between -amplitude a +amplitude. 

• LIMSinusoid sets AC output signal - sinus shape with limitation of amplitude- for voltage or current 

modes. The amplitude can be set. -The output switches between -amplitude a +amplitude. 

• PWMPositive sets POS type output signal - digital pulse width modulation. 

• PWMSymmetrical sets SYM type output signal - digital pulse width modulation. 

• PWMNegative sets NEG type output signal - digital pulse width modulation. 

• SQUare sets HSO type output signal - digital pulse output. 



If query is sent, M140 returns a string containing { DC | SIN | PULP | PULS | PULN | RMPA | RMPB | TRI | 

LIMS | PWMP | PWMS | PWMN | SQU } depending on the current setting. If impedance or temperature sensor 

simulation is set, NONE is returned. 

[SOUR] :VOLT [:LEVE] [:IMM] [:AMPL] (?) 

This command activates the generation of DC or AC voltage (depending on the DC or SIN parameter of the 

FUNC command). 

 

Represents the value of DC or AC voltage expressed in Volts. Negative value is accepted for DC voltage. 

“Technical Data” chapter lists the acceptable ranges. 

If query is sent, M140 returns the set value of current using standard exponential format. Example: 20.547mV is 

returned as -2.054700e-002. Positive numbers are not preceded with “+” sign. 

[SOUR] :CURR [:LEVE] [:IMM] [:AMPL] (?) 

This command activates the generation of DC or AC current (depending on the DC or SIN parameter of the 

FUNC command). 

 

Represents the value of DC or AC current expressed in Amperes. Negative value is accepted for DC current. 

“Technical Data” chapter lists the acceptable ranges. 

If query is sent, M140 returns the set value of current using standard exponential format. Example: 20.547mA is 

returned as -2.054700e-002. Positive numbers are not preceded with “+” sign. 

[SOUR] :RES [:LEVE] [:IMM] [:AMPL] (?) 

This command activates the generation of a resistance. 

 

Represents the value of the resistance in Ohms. “Technical Data” chapter lists the acceptable ranges. 

If query is sent, M140 returns the set value of resistance using standard exponential format. Example: 20.5Ω is 

returned as 2.050000e+001. 

[SOUR] :CAP [:LEVE] [:IMM] [:AMPL] (?) 

This command activates the generation of a capacitance. 

 

Represents the value of the capacitance in Ohms. “Technical Data” chapter lists the acceptable ranges. 

If query is sent, M140 returns the set value of capacitance using standard exponential format. Example: 20.5nF is 

returned as 2.050000e-008. 

[SOUR] :POWE :PHAS :UNIT (?) { DEG | COS } 

This command sets the method used to specify the phase shift between the output voltage and current. 

• DEG activates a mode where all entries are done using the angle, „°“ in the range of 0.0 – 360.0° 

• COS activates a mode where all entries are done using the power factor in the range of 1.000 to –1.000, 

LAG or LEAD ( LAG = 0-180°, LEAD = 180-360° ) 

The unit of measurement remains valid even after the calibrator is switched off and back on. 

If query is sent, M140 returns the set unit of measurement { DEG | COS }. 

Example: 

PHAS :UNIT DEG - sets the angle as the unit of measurement 

PHAS :UNIT ? - the calibrator returns DEG 


MEATEST 


[SOUR] :POWE :PHAS (?) [ , { LEAD | LAG } ] 

This command sets the phase shift between the output voltage and current. At the same time, the power 

generation mode is set. 

 

Represents the phase shift between the output voltage and current in degrees (DEG setting), or specified as a 

value of the power factor (COS setting). “Technical Data” chapter lists the acceptable ranges. 

,{LEAD|LAG} 

This parameter is entered only when specifying the value of the power factor. If the value is omitted, LAG is 

used. 

If query is sent, M140 returns the set value of the phase shift between the output voltage and current using 

standard exponential format. Example: 156.3 ° is returned as 1.563000e+002. 

Example: 

Example: 

POWE :PHAS 250.2 - activates the power generation mode and sets 250.2° phase shift 

between the output voltage and current 

POWE :PHAS ? - the calibrator returns 2.502000e+002 

POWE :PHAS 0.554 ,LAG - activates the power generation mode and sets 0.554 LAG 

power factor 

POWE :PHAS ? - the calibrator returns 5.540000e-001,LAG 

[SOUR] :POWE :VOLT [:LEVE] [:IMM] [:AMPL] (?) 

This command sets the amplitude of the voltage for power generation. At the same time, the power generation 

mode is set. 

 

Represents the voltage, expressed in Volts, used to generate the power. “Technical Data” chapter lists the 

acceptable ranges. 

If query is sent, M140 returns the set value of the voltage using standard exponential format. Example: 100.3V is 


[SOUR] :POWE :CURR [:LEVE] [:IMM] [:AMPL] (?) 

This command sets the amplitude of the current for power generation. At the same time, the power generation 

mode is set.. 

 

Represents the current, expressed in Amperes, used to generate the power. “Technical Data” chapter lists the 


If query is sent, M140 returns the set value of the current using standard exponential format. Example: 1.3A is 


[SOUR] :EART :VOLT (?) { ON | OFF | 0 | 1 } 

This command connects or disconnects the voltage Lo terminal to/from GND terminal. 

• ON or 1 grounds the voltage output 

• OFF or 0 ungrounds the voltage output 

If query is sent, M140 returns ON when the output is grounded or OFF when ungrounded. 

Example: 

EART : VOLT 1 - grounds the voltage output terminals 

EART : VOLT ? - the calibrator returns ON or OFF 

[SOUR] :EART :CURR (?) { ON | OFF | 0 | 1 } 



This command connects or disconnects the current Lo terminal to/from GND terminal. 

• ON or 1 grounds the current output 

• OFF or 0 ungrounds the current output 

If query is sent, M140 returns ON if the current terminals are gronded or OFF if ungrounded. 

Example: 

EART : CURR 1 - grounds the current output terminals 

EART : CURR ? - the calibrator returns ON or OFF 

[SOUR] :AUX (?) { ON | OFF | 0 | 1 } 

This command connects or disconnects the output signals to AUXILIARY connector. 

• ON or 1 - output signals are connected to AUXILIARY connector, front panel terminals are disconnected. 

• OFF or 0 - output signals are connected to front panel terminals, AUXILIARY connector is disconnected. 

If query is sent, M140 returns ON when the signals are connected to AUXILIARY connector or OFF when the 

signals are connected front panel terminals. 

Example: 

AUX 1 - output signals are connected to AUXILIARY connector 

AUX ? the calibrator returns ON or OFF 

[SOUR] :AUX :ADAP (?) 

This command can be used to find out what type of cable adapter is connected to AUXILIARY connector. 

If query is sent, M140 returns the type of cable adapter connected to AUXILIARY connector{ NONE | 

CA14001 | CA14041 | CA14040 | CA14060 | CA5 | CA6 | CA7 }. 

Example: AUX :ADAP ? - the calibrator returns NONE, when no cable adapter is connected, 

or the type of cable adapter connected to AUXILIARY connector 

[SOUR] :FREQ [:CW] (?) 

This command sets the frequency being generated. 

Examples: 

AC voltage frequency : 

FUNC :SIN ; :VOLT ; :FREQ 

AC current frequency : 

FUNC :SIN ; :CURR ; :FREQ 

Digital frequency : 

FUNC :SQU ; :FREQ 

 

Represents the frequency in Hz. . “Technical Data” chapter lists the acceptable ranges which depend on the 

selected function mode. 

If query is sent, M140 returns the set value of the current using standard exponential format. Example: 20.5kHz 

is returned as 2.050000e+004. 

[SOUR] :FREQ :DUTY (?) 

This command sets the duty cycle of PULP, PULS, PULN, PWMP, PWMS, PWMN function modes. 

Examples: 

To set symmetrical squarewave voltage signal, 10V with defined duty cycle: 

VOLT 10.0; FUNC :PULS ; FREQ :DUTY 

To set digital frequency POS signal with defined duty cycle : 

FUNC :PWMP ; FREQ :DUTY 


MEATEST 


 

Represents the duty cycle in percent. 0 to 100% can be set. 

If query is sent, M140 returns the set value of the duty cycle using standard exponential format. Example: 25% is 


[SOUR] :FREQ :VOLT (?) 

This command sets the amplitude of PWMP, PWMS, PWMN signals. 

Examples: 

To set the amplitude of PWMP digital frequency signal: 

FUNC :PWMP ; FREQ :VOLT 

 

Represents the voltage in Volts. 0.000 to 10.000 V can be set. 

If query is sent, M140 returns the set value of the amplitude using standard exponential format. Example: 2.05V 

is returned as 2.05000e+000. 

[SOUR] :FREQ :ATTE (?) 

This command sets the attenuation of digital SQU frequency signal. 

Examples: 

To set the attenuation of high frequency signal: 

FUNC :SQU ; FREQ :ATTE 

 

Represents the attenuation in decibels. 0 to -30 dB can be set in 10 dB increments. 

If query is sent, M140 returns the set value of the attenuation using standard exponential format. Example: -20 

dB is returned as -2.00000e+001. 

[SOUR] :TEMP :UNIT (?) { C | CEL | K } 

This command sets the unit of measurement of temperature. 

• C or CEL sets „Centigrade“ 

• K sets „Kelvin“ 

The unit of measurement remains valid after the calibrator is switched off. 

If query is sent, M140 returns the set unit of measurement{ C | K }. 

[SOUR] :TEMP :SCAL (?) { TS68 | TS90 } 

This command sets one of temperature scales. The setting influences the simulation of resistance temperature 

sensors and thermocouples. 

• TS68 sets IPTS-68 temperature scale 

• TS90 sets ITS-90 temperature scale 

The temperature scale remains valid after the calibrator is switched off. 

If query is sent, M140 returns the set temperature scale { TS68 | TS90 }. 

[SOUR] :TEMP :THER [:LEVE] [:IMM] [:AMPL] (?) 

This command activates the simulation of thermocouples (DC voltage generation). 



 

Represents the temperature expressed in the units set by the ‘UNIT’ command. “Technical Data” chapter lists the 


If query is sent, M140 returns the set temperature using standard exponential format. Example: 20.5°C is 


[SOUR] :TEMP :THER :RJUN (?) 

This command sets the temperature of cold end of thermocouple. 

 



Example: to set the temperature of cold end of thermocouple to 25°C: 

:TEMP :THER :RJUN 25 



[SOUR] :TEMP :THER :TYPE (?) { B | E | J | K | N | R | S | T } 

This command sets the type of thermocouple to be simulated. 

Example: to activate the simulation of S type thermocouple at 350°C: 

:TEMP :THER 350; :TEMP :THER :TYPE S 

If query is sent, M140 returns the set type thermocouple { B | E | J | K | N | R | S | T }. 

[SOUR] :TEMP :PRT [:LEVE] [:IMM] [:AMPL] (?) 

This command activates the simulation of resistance temperature sensors (resistance generation). 

 





[SOUR] :TEMP :PRT :TYPE (?) { PT385 | PT392 | NI } 

This command sets the type of resistance temperature sensor to be simulated. 

Example: to activate the simulation of platinum resistance temperature sensor at 350°C approximated using 

PT385 table (Europe): 

:TEMP :PRT 350; :TEMP :PRT :TYPE PT385 

If query is sent, M140 returns the set type of approximation table { PT385 | PT392 | NI }. 

[SOUR] :TEMP :PRT :NRESistance (?) 

This command sets the nominal resistance of the resistance temperature sensor at 0°C. 10Ω to 2kΩ can be set. 

 

Represents the nominal resistance in Ohms. 

If query is sent, M140 returns the set value of nominal resistance using standard exponential format. Example: 

20.5Ω is returned as 2.050000e+001. 


MEATEST 


MEASure subsystem 

This subsystem allows to control the internal multimeter of M140 calibrator. It sets the multimeter’s functions 

and reads measured values. 

Keyword 

Parameters 

MEASure 

? 

: CONFigure 

: VOLTage 

: CURRent 

: MVOLTage 

: RESistance 

: FREQuency 

: TEMPerature 

: RTD 

: TYPE (?) { PT385 | PT392 } 

: NRESistance (?) 

: THERmocouple 

: TYPE (?) { B | E | J | K | N | R | S | T } 

: RJUNction (?) 

: SGS 

: VOLTage (?) 

: OFF 

MEAS ? 

This command returns the measured value. 

Example:20.5Ω is returned as 2.050000e+001. 

MEAS :CONF ? 

M140 returns the set measurement mode { VOLT | CURR | MVOLT | RES | FREQ | TEMPerature:RTD | 

TEMPerature:THERmocouple | SGS | OFF }. 

MEAS :CONF :VOLT 

This command selects the function VOLT (range 0 .. 12V) of internal multimeter and switches it on. 

Example: to set the multimeter to DC voltage 10V measurement mode: 

MEAS :CONF :VOLT 

MEAS :CONF :CURR 

This command selects the function CURR (range 0 .. 25mA) of internal multimeter and switches it on. 



Example: to set the multimeter to DC current 20mA measurement mode: 

MEAS :CONF :CURR 

MEAS :CONF :MVOLT 

This command selects the function MVOLT (range 0 .. 2000mV) of internal multimeter and switches it on. 

Example: to set the multimeter to DC voltage 2000mV measurement mode: 

MEAS :CONF :MVOLT 

MEAS :CONF :RES 

This command selects the function RES (range 0 .. 2000Ω) of internal multimeter and switches it on. 

Example: to set the multimeter to resistance measurement mode: 

MEAS :CONF :RES 

MEAS :CONF :FREQ 

This command selects the function FREQ of internal multimeter and switches it on. 

Example: to set the multimeter to frequency measurement mode: 

MEAS :CONF :FREQ 

MEAS :CONF :TEMP :RTD :TYPE (?) { PT385 | PT392 } 

This command selects the function RTD of internal multimeter, sets the type of resistance temperature sensor 

and switches the multimeter on. 

Example: to set the multimeter to resistance temperature sensor type PT385 measurement mode: 

MEAS :CONF :TEMP : RTD :TYPE PT385 

If query is sent, M140 returns the set type of approximation table { PT385 | PT392 }. 

MEAS :CONF :TEMP :RTD :NRESistance (?) 

This command selects the function RTD of internal multimeter, sets the nominal resistance of the resistance 

temperature sensor to 0°C and switches the multimeter on. 10Ω to 2kΩ can be set. 

 

Represents the nominal resistance in Ohms. 

Example: to set the multimeter to resistance temperature sensor Pt100 measurement mode: 

MEAS :CONF :TEMP : RTD :NRES 100 

If query is sent, M140 returns the set value of nominal resistance using standard exponential format. Example: 

20.5Ω is returned as 2.050000e+001. 

MEAS :CONF :TEMP :THER :TYPE (?) { B | E | J | K | N | R | S | T } 

This command selects the function TC of internal multimeter, sets the type of thermocouple and switches the 

multimeter on. 

Example: to set the multimeter to thermocouple R measurement mode: 

MEAS :CONF :TEMP : THER :TYPE R 


MEATEST 


If query is sent, M140 returns the set type of thermocouple { B | E | J | K | N | R | S | T } 

MEAS :CONF :TEMP :THER :RJUNction (?) 

This command selects the function TC of internal multimeter, sets the temperature of cold junction of selected 

thermocouple and switches the multimeter on. 

 

Represents the temperature expressed in the unit set by the ‘UNIT’ command. In “Technical Data” chapter there 

is list of acceptable ranges. 

Example: to set the temperature of cold end of thermocouple to 25°C: 

MEAS :CONF :TEMP :THER :RJUN 25 



MEAS :CONF :SGS :VOLT (?) 

This command selects the function SGS of internal multimeter, sets the supply voltage of sensor and switches 

the multimeter on. 

 

Represents the supply voltage in V. 0V to 20V can be set. 

Example: to set the multimeter to SGS measurement mode and power supply of sensor to 10V: 

:MEAS :CONF :SGS :VOLT 10 

If query is sent, M140 returns the supply voltage of SGS using standard exponential format. Example: 15V is 


MEAS :CONF :OFF 

This command switches the multimeter off. 

TESTer subsystem 

This subsystem allows to control features of M140 calibrator when used as tester. It starts selected test procedure 

and reads its result. 

Keyword 

Parameters 

TESTer 

: RUN 

: RESUlt ? 

TEST :RUN 

This command starts selected procedure. Number 1 to 10 can be set. 

 

Represents number of procedure. 

Example: to run test procedure 3 : 

TEST :RUN 3 



TEST :RESU ? 

M140 returns the result of selected procedure { PASS | FAIL | RUN }. 

String „RUN“ is returned if selected procedure isn’t finished. 

I/D (instrument identification) 

*IDN? 

This command returns the identification of the manufacturer, model, serial number and firmware revision. 

The reply is formatted as follows: 

MEATEST,M-140,412341,4.6 

Operation complete 

*OPC 

This command sets the OPC bit in the ESR (Event Status Register) when all pending operations are complete. 

Operation complete? 

*OPC? 

This command returns “1” to the output queue after all pending operations are complete. 

Operation complete? 

*OPC? 

This command returns “1” to the output queue after all pending operations are complete. 

Wait-to-Continue command 

*WAI 

Prevents the instrument from executing any further commands or queries until all previous remote commands 

have been executed. 

Reset 

*RST 

This command resets the calibrator to its initial status. 

Test operation 

*TST? 

This command executes an internal self-test. Return the self-test result (“0” for pass or “1” for fail). 


MEATEST 


Status byte reading (IEEE488 only) 

*STB? 

This query returns the Status Byte Register including the MSS bit. 

Service Request Enable setting (IEEE488 only) 

*SRE 

This command sets condition of the Service Request Enable register. Since bit 6 is not used, the maximum entry 

is 191. 

Service Request Enable reading (IEEE488 only) 

*SRE? 

This query returns the Service Request Enable Register. 

Event Status Register reading (IEEE488 only) 

*ESR? 

This query returns the contents of the Event Status Register and clears the register. 

Event Status Enable setting (IEEE488 only) 

*ESE 

This command programs the Event Status Enable register bits. If one or more of the enabled events of the Event 

Status Enable register is set, the ESB of Status Byte Register is set too. 

Event Status Enable reading (IEEE488 only) 

*ESE? 

This query returns the Event Status Enable register. 

Clear status (IEEE488 only) 

*CLS 

This command clears the Event Status Register and the Status Byte Register except the MAV bit and output 

queue. 

Remote control 

*REM 

This command activates the remote control. When the calibrator is controlled by GPIB bus, it goes to the remote 

control mode automatically. When remote control is active, the calibrator ignores all controls from the front 

panel, except LOCAL button. 



Local control 

*LOC 

This command activates the local control (using front panel buttons). When the calibrator is controlled by GPIB 

bus, it goes to the local control mode automatically. 

Local control lock 

*LLO 

This command locks out the local control; the calibrator cannot be returned to local control by pressing LOCAL 

button. Return to local control can only be performed by a command sent through the bus, or by switching the 

calibrator off and on. 

Local control unlock 

*UNL 

This command cancels the „*LLO“ command. Unlocked calibrator can be returned to local control mode by 

pressing LOCAL button. 


MEATEST 


Standard Status Data Structures 

All status registers are defined by the IEEE-488.2 standard. The programmer has access to Status Register, 

Enable Register and Output Queue in the M140 Calibrator. 

Status data structure of M140 Calibrator contains following registers: 

STB – Status Byte Register 

SRE – Service Request Enable Register 

ESR – Event Status Register 

ESE – Event Status Enable Register 

Output Queue 

STB Status Byte Register 

The summary messages from the Event Status Register and Output Queue are used to set or clear the appropriate 

bits (B4 and B5) of the Status Byte Register. These bits do not latch, and their states (0 or 1) are solely 

dependent on the summary messages (0 or 1). For example, if the Standard Event Register is read, its register 

will clear. As a result, its summary message will reset to 0, which in turn will clear the ESB bit in the Status Byte 

Register. 

Bit configuration of Status Byte Register : 



RQS 

MSS 

Request Service, bit 6. The RQS bit is set to 1 whenever bits ESB or MAV change from 0 to 1 and are 

enabled (1) in the SRE. When RQS is 1, the M140 asserts the SRQ control line on the IEEE-488 

interface. You can do a serial poll to read this bit to see if the M140 is the source of an SRQ. 

Master Summary Status, bit 6. The MSS bit is set to 1 whenever bits ESB or MAV are 1 and enabled 

(1) in the SRE. This bit can be read using the *STB? command in serial remote control in place of doing 

a serial poll. 

ESB Event Summary Bit, bit 5. The ESB bit is set to 1 when one or more enabled ESR bits are set to 1. 

Conversely, the ESB bit is set to 0 when no enabled ESR bits are set to 1. 

MAV 

Message Available, bit 4. The MAV bit is set to 1 whenever data is available in the M140 IEEE488 

Output Queue. This message is used to synchronize information exchange with the controller. The 

controller can, for example, send a query command to the M140 and then wait for MAV to become 

TRUE. The IEC 625-1 bus is available for other use while an application program is waiting for a 

device to respond. If an application program begins a read operation of the Output Queue without first 

checking for MAV, all system bus activity is held up until the M140 responds. 

SRE Service Request Enable Register 

The Service Request Enable Register is an 8-bit register that enables corresponding summary messages in the 

Status Byte Register. Thus the application programmer can select reason for a device (M140) to issue a service 

request by altering the contents of the SRE. The Service Request Enable Register is read with the *SRE? 

common query. The response message to this query represents the sum of the binary-weighted values of the 

SRE. The value of unused bit 6 shall always be zero. The Service Request Enable Register is written with the 

*SRE common command followed by an integer value (0 – 191). Sending the *SRE common command 

followed by a zero clears the SRE. A cleared register does not allow status information to generate a rsv local 

message and thus, no service request are issued. The Service Request Enable Register is cleared upon power-on. 

ESR Event Status Register 

The Event Status Register is a two-byte register in which the higher eight bits are always 0, and the lower eight 

bits represent various conditions of the M140 calibrator. The ESR is cleared when the power is turned on, and 

every time it is read. 

Bit configuration of Event Status Register : 

PON 

URQ 

CME 

EXE 

DDE 

QYE 

OPC 

Power On, bit 7. This event bit indicates that an off-to-on transition has occurred in the device’s power 

supply. 

User Request, bit 6. This event bit indicates disconnecting or connecting of any cable adapter to the 

auxiliary connector on the front panel. 

Command Error, bit 5. This event bit indicates that an incorrectly formed command or query has been 

detected by the M140. 

Execution Error, bit 4. This event bit indicates that the received command cannot be executed, owing to 

the device state or the command parameter being out of bounds. 

Device Dependent Error, bit 3. This event bit indicates that an error has occurred which is neither a 

Command Error, a Query Error, nor an Execution Error. A Device-specific Error is any executed device 

operation that did not properly complete due to some condition, such as overload. 

Query Error, bit 2. This event bit indicates that either: 

1. an attempt is being made to read data from the Output Queue when no output is either present or 

pending 

2. or data in the Output Queue has been lost 

Operation Complete, bit 0. This event bit is generated in response to the *OPC command. It indicates 

that the device has completed all selected pending operations. 


MEATEST 


ESE Event Status Enable Register 

The Event Status Enable Register allows one or more events in the Event Status Register to be reflected in the 

ESB summary-message bit. This register is defined for 8 bits, each corresponding to the bits in the Event Status 

Register. The Event Status Enable Register is read with the common query *ESE?. Data is returned as a binaryweighted 

value. The Event Status Enable Register is written to by the common command, *ESE. Sending the 

*ESE common command followed by a zero clears the ESE. The Event Status Enable Register is cleared upon 

power-on. 

Output Queue 

The Output Queue stores response messages until they are read. The availability of output is summarized by the 

MAV (message available) summary message. The MAV summary message is used to synchronize information 

exchange with the controller. The Output Queue shall be a first in, first out (FIFO) Queue. The Output Queue is 

cleared upon power-on. 



Examples of use 

Calibration of measurement instruments 

The calibrator can be used for direct calibration of various instruments which measure electrical values. Opt. 

140-01 cable adapter is recommended. The cable adapter includes a temperature sensor which allows the 

measurement of external temperature. Measured value can be displayed by pressing INPUT button. 

Multimeters 

The calibrator can be used for calibration of digital and analogue multimeters (DCV, ACV, DCI, ACI, 

resistance, capacitance, temperature, frequency and duty cycle. 

Voltage ranges 

Thanks to low output impedance and high output current, the calibrator can be used for calibration of analogue 

voltmeters and milivoltmeters having low input impedance. Voltage output is connected to Hi/Lo terminals. The 

calibrator does not allow the four-wire connection of the instrument to be calibrated. 

It is not recommended to connect non-standard load to the voltage output. The calibrator is designed to be used 

for calibration of voltmeters. Output terminals should be loaded with high and real impedance. Although the 

output is fitted with fast electronic and microprocessor protection, high capacitance or inductance loads can lead 

to oscillations of output amplifiers and result in damage. 

The instrument to be calibrated can be connected either directly to the front panel terminals, or through Opt.140- 

01 cable adapter. If L terminal of the instrument to be calibrated is not grounded, then calibrator’s Lo terminal 

should be grounded (GND U ON, see „Setup menu“ chapter). 

Connection of a multimeter to be calibrated (voltage range) to calibrator’s output terminals 

Truncated waveform with defined distortion can be used for testing of multimeters 


MEATEST 


Connection of a multimeter to be calibrated (voltage range) to the terminals of 140-01 cable adapter 

Current ranges 

All DC and AC current ranges are connected to calibrator’s +I/-I terminals. 

If current is drawn from calibrator’s +I and –I output terminals, +I and –I output terminals located at 

140-41 cable adapter must not be connected simultaneously! 

When using the current output under heavy load (10 to 20 A), the runtime is limited to 0 to 60 s. The runtime 

depends on the set current and it is controlled by the microprocessor. The user cannot extend the runtime; if 

longer runtime is required, the output terminals must be unloaded, some time must elapse (for example1 min.) 

and the load can then be connected again. 

When feeding 2 to 20 A current to the output terminals, the output voltage must not exceed approx. 1.5 Vef. If 

the current induces higher voltage on the load, the calibrator disconnects the output terminals and displays an 

error message. 

When ammeters are being calibrated using currents over 1 A, it is important to connect the terminals properly, 

paying attention both to the calibrator’s output terminals and the instrument’s input terminals. Excessive contact 

resistance can heat up the terminals and cause calibration errors. Excessive and unstable contact resistance has 

non-linear characteristic and can distort the output AC current. 

It is not recommended to connect non-standard load to the current output. The calibrator is designed to be used 

for calibration of ammeters. Output terminals should be loaded with low and real impedance. Although the 

output is fitted with fast electronic and microprocessor protection, high capacitance or inductance can lead to 

oscillations of output amplifiers and result in damage. 

The instrument to be calibrated can be connected either directly to the front panel terminals, or to Opt.140-01 

cable adapter. If L terminal of the instrument to be calibrated is not grounded, then calibrator’s -U (-I) terminal 

should be grounded (GND U ON, GND I ON, see „Setup menu“ chapter). 



Connection of a multimeter to be calibrated (current range) to calibrator’s output terminals 

Optional current coil can extend the calibrator’s current range to 1000 A. The coil can be used for calibration of 

both DC and AC ammeters. The clamps of the ammeter must be positioned in angle 90 o to the coil. When using 

the current coil, no steel or other magnetic objects must be present in the vicinity (50 cm) of the current coil, as 

they would deform the magnetic field and cause big calibration error. 

Connection of current coil: 

Current coil 

130-50, 140-50 

Powermeters 

The calibrator can be used for calibration of DC and AC digital and analogue powermeters and energy meters. 

The following limitations apply: voltage 0.2 V to 240 V 

current 2 mA to 10 A 

frequency DC, 40 Hz to 400 Hz 

time 

1.1 s to 1999 s 

phase shift -180 to +180° 

The display can show active, reactive and apparent power and energy values. The phase shift between the output 

voltage and current can be set and displayed as well, either as the power factor (PF, cos ϕ) or as the phase shift in 

degrees. 

In the P-E mode, the permitted load of the voltage and current outputs is the same as in the voltage and current 

modes. If the output is overloaded, the calibrator disconnects the output terminals and displays an error message. 

For calibration of tong powermeters, current coil can be used. Power factor meters can be calibrated as well. 


MEATEST 


Basic connection of a powermeter to the calibrator 

HU LU HI LI 

Possible methods of grounding of the measurement circuit 

To prevent the creation of ground loops and to ensure the guaranteed precision of the calibrator, the powermeter 

to be calibrated as well as the calibrator must be properly grounded. 

Depending on the nature of the measurement instrument to be calibrated, the following situations can occur: 

Device under test GND U GND I 

U input floating 

I input floating 

U and I inputs galvanically 

disconnected, not grounded 

U input floating 

I input floating 

galvanically connected terminals L 

both U and I inputs, not grounded 

voltage input grounded 

current input floating 

voltage input floating 

current input grounded 

both voltage and current inputs 

grounded 

ON 

ON 

(OFF) 

OFF 

ON 

OFF 

ON 

OFF 

(ON) 

ON 

OFF 

OFF 

ATTENTION 

The voltage between calibrator’s –I and Lo outputs must not exceed 10 V. 



Counters and oscilloscopes 

The calibrator can be used for basic calibration of the frequency ranges of multimeters and simple counters. The 

calibrator provides the following functions: 

• calibration of frequency functions up to 20 MHz using squarewave signal. The function is activated by 

pressing F direct mode button and selecting HF mode. Frequency can be set. 

• check of input sensitivity from 1 mV to 10 V in the frequency range up to 100 kHz. The function is 

activated by pressing F direct mode button and selecting PWM mode. Frequency, amplitude and duty cycle 

can be set. 

• calibration of time period using squarewave signal whose period can be set up to 10 s, with selectable duty 

cycle. The function is activated by pressing F direct mode button and selecting PWM mode. Frequency, 

amplitude and duty cycle can be set. 

The instrument to be calibrated connects to FREQ connector using BNC/banana cable. 

Connection of the frequency output 

Counter to be calibrated 

Coaxial cable 

The calibrator can be used for basic calibration of oscilloscopes. The calibrator provides the following functions. 

• check of time base up to 20 MHz using squarewave signal. The function is activated by pressing F direct 

mode button and selecting HF mode. Frequency can be set. 

• check of vertical channel input sensitivity from 1 mV to 10 V in the frequency range up to 10 kHz. The 

function is activated by pressing F direct mode button and selecting PWM mode. Frequency, amplitude and 

duty cycle can be set. 

• check of bandwidth using a signal up to 20 MHz with very steep rising edge (less than 5 ns). Calibration of 

time period using squarewave signal whose period can be set up to 10 s, with selectable duty cycle. The 

function is activated by pressing F direct mode button and selecting PWM mode. Frequency can be set. The 

delay of the signal displayed on the oscilloscope’s screen is checked. 

The oscilloscope to be calibrated connects to FREQ connector using a coaxial cable. 

Thermometers 

The calibrator can be used for calibration of transducers used in thermometers and heat meters, which use a 

thermocouple or Pt or Ni sensor. The block connected to the sensor is checked, as it is disconnected from the 

transducer and the calibrator’s output is connected to the transducer’s input instead. Simulation of thermal sensor 

is activated by pressing T direct mode button. Pt and Ni resistance temperature sensors as well as K, N, R, S, B, 

J, T, E thermocouples can be simulated. 

The calibrator can be connected to transducer’s input in one of the following ways: 

• without the cable adapter, directly to Hi/Lo terminals. Temperature of cold junction must be compensated by 

manual setting of RJ value. The connection is similar to voltmeter connection. 

• with cable adapter Option 140-01 to the terminals Hi/Lo. Automatic compensation of TC sensors cold 

junction can be used here. The cable adapter is equipped with build-in Pt1000 temperature, which measures 

ambient temperature. After build-in meter switching on (button INPUT ON) and with cable adapter 140-01 

connected, automatic compensation of TC cold junction temperature is performed. When meter is 

deactivated (INPUT OFF), cold junction temperature (RJ) can be set manually only. Connection of device 

under test is similar to the voltmeter connection. 


MEATEST 


• using 140-01 cable adapter and OUTPUT terminals. Temperature of cold junction must be compensated by 

manual setting of RJ value. 

Connection of the transducer to be checked using 140-41 cable adapter 

DUT 

+TC 

-TC 

Measurement 

Thanks to built-in multimeter, the calibrator can be used for basic calibration of some sources of electrical 

signals. The table lists the type of adapter which is necessary for a particular measurement. 

Applications and desired options 

DC voltage to 12 V Opt. 40 or Opt 140-41 

DC current to 25 mA Opt. 40 or Opt 140-41 

Impulse frequency to 15 kHz Opt. 40 or Opt 140-41 

Temperature through external TC sensor 

Opt.140-41 

Temperature through external RTD sensor 

Opt. 60 or Opt.140-41 

Non-electric quantities with strain gauge sensors (force, pressure, Opt.140-41 

torque, etc.) 

Resistance to 2 kΩ Opt. 60 or Opt. 140-41 

Voltage, current and frequency 

10 V voltage range, 20 mA current range and frequency up to 15 kHz can be measured using Opt. 40 cable. The 

connection simple. The cable is connected to calibrator’s AUXILIARY connector, the other end has bananas 

which connect calibrator to the measured object. When making the connection, observe the polarity and connect 

the calibrator’s L terminal to the L (common) or grounded terminal of the measurement instrument. To activate 

the measurement, select the respective function mode and press INPUT to measure the input value. 

ATTENTION 

The input terminals of the built-in multimeter are floating. Maximum voltage between 

the input terminals and the chassis is 15 Vpk. If this value is exceeded, the multimeter 

can be damaged. 

If the measurement range is exceeded, the calibrator displays an error message; input terminals are disconnected 

only in the voltage and current measurement mode and remain connected in all other modes. 

If 140-41 cable adapter is used, the signal to be measured is connected to U/I – COM terminals. COM is the 

common terminal of the multimeter. 

Connection of the multimeter when measuring the voltage, current and frequency using Opt. 140-41 cable 

adapter 



H 

L 

The multimeter allows the measurement of small DC voltages in the range of 0 to 2 V. 140-41 cable adapter is 

required. The signal to be measured connects to Hu/+mV and Lu/-mV terminals. Lu/-mV is the common 

terminal of the multimeter. To activate the measurement, select mVDC function mode using METER button in 

the function menu and press INPUT to measure the input value. 

Measurement of resistance or temperature using resistance temperature sensors 

Resistance can only be measured using four-wire connection using Opt. 60 or Opt. 140-41 cable adapter. Opt. 60 

cable ends with four bananas, labeled Hi, Hu, Lu, Li. Their meaning is as follows: 

• Hi current terminal H 

• Hu voltage terminal H 

• Lu voltage terminal L 

• Li current terminal L 

During the measurement of resistance or temperature using resistance temperature sensors, the rules applicable 

to the four-wire connection must be observed. 

Connection of Pt100 sensor using Opt. 60 cable: 

Pt100 

Hi 

Hu 

Lu 

Li 

Connection of Pt100 sensor using 140-41 cable adapter 


MEATEST 


Pt100 

Hi 

Hu 

Lu 

Li 

Measurement of temperature using thermocouples 

The built-in multimeter allows the measurement of temperature using external thermocouple. 140-41 is required. 

The thermocouple connects to Hu/+mV and Lu/-mV terminals. Temperature of cold junction must be set 

manually. 

To activate the measurement, select T TC function mode using METER button in the function menu and press 

INPUT to measure the input value. 

Connection of thermocouple to 140-41 cable adapter: 

H 

L 

Strain gauge sensors for non-electrical values 

The calibrator can be used to measure non-electrical values using bridge-connected strain gauges. The bridge is 

supplied with DC voltage up to 15 V while measurement of small DC voltages between the other two points of 

the bridge is measured. Each sensor is characterized by calibrated sensitivity of output voltage dependency on 

the measured non-electrical value. 



140-41 cable adapter fitted with separate 7pin connector labeled SENSOR is required. The picture shows the 

connection of the sensor to the calibrator. 

SGS sensor 

Connection of the sensor to SENSOR connector 

SENSOR connector 

4 

3 

SGS sensor 

5 

7 

2 

6 

1 

Meaning of pins of SENSOR connector: 

1 Voltage signal output of the bridge 

2 Power supply + power to the bridge 

3 Not connected 

4 Not connected 

5 Voltage signal output of the bridge 

6 Power supply - power to the bridge 

7 Shielding 


MEATEST 


Testing of regulation and measurement sets and evaluation units 

The calibrator can be used for calibration and testing of various instruments and regulators which must be fed by 

precise signal and whose response (electrical signal) is to be measured. 

Two methods of connection can be used, each of them having different function and generation and 

measurement ranges. 

Simultaneous mode can only be used if Opt 40, 60, or 140-41 cable adapter is connected to AUXILIARY 

terminal. When no adapter is connected, simultaneous mode cannot be activated. 

Use of Opt. 140-41 cable adapter 

This adapter allows full utilization of the features of the built-in multimeter. It can be used during the calibration 

of objects which require the simulation of temperature or other non-electrical sensor signals, or the generation of 

small DC voltages at the input side, and the measurement of standard outputs (current loop, standard voltage) at 

the output side. 

When using 140-41 cable adapter, OUTPUT 140-41 option must be set in the setup menu. This function selects 

the calibrator’s output terminals. If OUTPUT 140-41 option is set to PANEL, calibrator’s output is connected to 

front panel terminals (not to the cable adapter). If this option is set to AUX, output signals are connected to the 

cable adapter (not to the front panel terminals). “Multimeter/Simultaneous function” chapter defines the limits of 

functions and ranges. 

If 140-41 cable adapter is used for simultaneous calibration and OUTPUT 140-41 option is set to AUX, the 

following generation/measurement ranges can be set: 

Generator 

DCV 

DCI 

Resistance 

RTD sensor simulation 

TC sensor simulation 

Meter 

DCV 

mVDC 

DCI 

Resistance 

Frequency 

0 – 20 V 

0 – 20 mA 

0 – 50 MΩ 

Pt 1.385, Pt 1.392, Ni 

K, N, R, S, B, J, T, E 

0 – 12 V 

0 – 2 V 

0 – 25 mA 

0 – 2 kΩ 

1 – 15kHz 



If 140-41 cable adapter is used for simultaneous calibration and OUTPUT 140-41 option is set to PANEL, the 

following generation/measurement ranges can be set: 

Generator 

DC/AC V 

DC/ AC I 

Resistance 

RTD sensor simulation 

TC sensor simulation 

Fequency 

Power/Energy 

Meter 

DCV 

MVDC 

DCI 

Resistance 

Frequency 

0 – 1000 V 

0 – 20 A 

0 – 50 MΩ 

Pt 1.385, Pt 1.392, Ni 

K, N, R, S, B, J, T, E 

0.1 – 20 MHz 

0.2 – 240 V / 0.2 – 20 A 

0 – 12 V 

0 – 2 V 

0 – 25 mA 

0 – 2 kΩ 

1 – 15 kHz 

When 140-41 cable adapter is connected, only harmonic signals are generated (SHAPE function is inactive). 

Use of Option 40/60 cable adapter 

Opt. 40 cable supports simultaneous mode - measurement of voltage up to 12 V, current up to 25 mA and 

frequency up to 15 kHz. Opt. 60 cable is designed for four-wire measurement of resistance or temperature using 

resistance temperature sensors. The generation ranges are the same as when 140-41 cable adapter is used. 

Use of Option 70 

Adapter is aimed for four-wire generation of resistance values and for four-wire resistance temperature sensor 

simulation. Re-calibration of resistance function of the calibrator can be performed only with this adapter. 

Resistance ranges are the same as two-wire resistance ranges with output on Hi – Lo terminals on front panel. 

When adapter Option 60 is used, resistance output is only on output terminals on this adapter. Front panel Hi – 

Lo terminals are switched off. 

When adapter Option 60 is used, set resistance value is connected to the adapter output terminals permanently. 

Status of button ON/OFF doesn’t influence resistance connecting or disconnecting. 

Examples of tests 

Examples of applications 

Generation Measurement Application 

Pt 100 10 V / 20 mA / f Calibration of temperature evaluation units, setting of 

temperature regulators 

TC 10 V / 20 mA / f Calibration of temperature evaluation units, setting of 

temperature regulators 

Frequency 10 V / 20 mA Setting/calibration of energy meters 

Resistance 10 V / 20 mA Measurement of resistance bridges 

1. Calibration of industrial thermometers with Pt100 sensor and 20 mA / 10 V output: 


MEATEST 


DUT 

INPUT OUTPUT 

Pt100 H L 

Function setup: Calibrator T RTD function 

OUTPUT 140-41 ON 

Multimeter DCV or DCI depending on the output signal type of the unit 

being tested 

Adapter Opt. 140-41 

2. Calibration of industrial thermometers with thermocouple sensor and frequency output: 

DUT 

INPUT OUTPUT 

TC H L 

Function setup: Calibrator T TC function 

OUTPUT 140-41 ON 

Multimeter F 

Adapter Opt. 140-41 

3. Calibration of a single phase “electrical power/current loop” transducer 

DUT – power transducer 

INPUT 

OUTPUT 

HU LU HI LI +I -I 

Opt. 40 adapter 

Function setup: Calibrator P function (voltage, current, power factor, frequency) 

Multimeter DCI 

Adapter Opt. 40 



Testing 

When the calibrator is used as a tester, the results of the tests (PASS/FAIL) can be used to sort the products etc. 

Contacts of the relay are connected to 140-41 cable adapter’s front panel using black terminals ∅ 4mm. Basic 

definition of the status of the relay is performed using SETUP MENU and is valid for all test programs. 


MEATEST 

Specification 


Uncertainties include long-term stability, temperature coefficient, linearity, load and line regulation and the 

traceability of factory and National calibration standards. Specified accuracy is valid after one hour warm up in 

temperature range 23 ± 2 o C. Specified accuracy is one year accuracy. 

Calibrator 

Voltage 

summary range DCV: 

0 µV – 1000 V 

summary range ACV: 

0.1 mV – 1000 V 

internal ranges: 

20 mV, 200 mV, 2 V, 20 V, 240 V, 1000 V 

voltage resolution: 

61/2 digit 

frequency resolution: 

6 digit, minimum step 0.001Hz 

frequency accuracy: 0.005 % 

frequency range: 

20 Hz to 100 kHz bellow 20 V 

20 Hz to 10 kHz bellow 200 V 

20 Hz to 1000 Hz bellow 1000 V 

DCV uncertainty 

range % value + % range max. current mA 

0 µV – 20.00000 mV 0.03 + 0.0 + 10 µV 5 

20.00001 mV – 200.0000 mV 0.01 + 0.0 + 15 µV 5 

0.200001 mV – 2.000000 V 0.003 + 0.0008 30 

2.00001 V – 20.00000 V 0.003 + 0.0005 30 

20.0001 V – 240.0000 V 0.003 + 0.0005 30 

240.001 V – 1000.000 V 0.005 + 0.005 2 

* 2 value of the range for uncertainty calculation is 200 V 

ACV uncertainty 

range % value + % range max. current mA % value + % range max. current mA 

20 Hz - 10 kHz 20 Hz - 10 kHz 10 kHz - 50 kHz 10 kHz - 50 kHz 

0.10000 mV – 20.00000 mV 0.2 + 0.05 + 20 µV 5 0.20 + 0.10 + 20 µV 5 

20.0001 mV – 200.0000 mV 0.1 + 0.03+ 20 µV 5 0.15 + 0.05 + 20 µV 5 

0.200001 mV – 2.000000 V 0.025 + 0.005 30 0.05 + 0.01 10 

2.00001 V – 20.00000 V 0.025 + 0.005 30 0.05 + 0.03 10 

20.0001 V – 240.0000 V * 2 0.025 + 0.010 30 - - 

240.001 V – 1000.000 V 0.03 + 0.02 * 1 2 - - 

* 1 valid for f < 1000 Hz 

* 2 value of the range for uncertainty calculation is 200 V, in the range 200 to 240 V is frequency limited to 1000 Hz. 

range % value+ % range max. current mA 

50 kHz - 100 kHz 50 kHz - 100 kHz 

0.10000 mV – 20.00000 mV 1.0 + 0.10 + 20 µV 3 

20.0001 mV – 200.0000 mV 0.3 + 0.05 + 20 µV 3 

0.200001 mV – 2.000000 V 0.2 + 0.05 5 

2.00001 V – 20.00000 V 0.2 + 0.05 5 

20.0001 V – 240.0000 V * 2 - - 

240.001 V – 1000.000 V - - 

Auxiliary parameters 

range 20mV 200mV 2V 20V 200V 1000V 

THD *3 *4 0,05% + 200 uV 0,05% + 300 uV 0,05% 0,05% 0,05% 0,2% 

output impedance < 10 mΩ < 10 mΩ < 10 mΩ < 10 mΩ < 100 mΩ < 100 mΩ 

maximal capacitance 500 pF 500 pF 500 pF 500 pF 300 pF 150 pF 

load 

*3 

parameter includes non-linear distortion and non-harmonic noise 

*4 

valid for frequencies to 10 kHz 



Function Shape 

voltage range: 

1 mV to 200 V 

wave form: 

square, positive, negative, symmetrical, ramp A, ramp B, triangle 

truncated sin with THD 13,45 % 

peak value uncertainty: 

0.3 % + 50 uV 

displayed values: 

peak, effective 

Minimum frequency for squarewave signals is 0.1 Hz, for all others 20 Hz. 

Current 

summary range DCI: 0 µA - 20 A (with current coil 140-50 to 1000A) 

summary range ACI: 1 µA – 20 A (with current coil 140-50 to 1000 A) 

internal ranges: 

200 µA, 2 mA, 20 mA, 200 mA, 2 A, 20 A 

resolution: 

61/2 digit 



frequency accuracy: 0.005 % 

frequency range: 20 Hz to 5 kHz bellow 200 mA 

20 Hz to 1000 Hz bellow 20 A 

DCI uncertainty 

range % value + % range max. voltage V 

0.0000 µA – 200.0000 µA 0.05 + 0.0 + 20 nA 3 

0.200001 µA – 2.000000 mA 0.02 + 0.005 3 

2.00001 mA – 20.00000 mA 0.01 + 0.003 3 

20.0001 mA – 200.0000 mA 0.01 + 0.003 3 

0.200001 mA – 2.000000 A 0.015 + 0.005 3 

2.00001 A – 20.00000 A 0.02 + 0.010 1.5 

ACI uncertainty 

range % value + % range max voltage Vef % value + % range max voltage Vef 

20 Hz - 1 kHz 1 kHz – 5 kHz 

1.0000 µA – 200.0000 µA 0.15 + 0.0 + 20 nA 3 0.30 + 0.10 + 20 nA 3 

0.200001 µA – 2.000000 mA 0.07 + 0.01 3 0.20 + 0.05 3 

2.00001 mA – 20.00000 mA 0.05 + 0.005 3 0.20 + 0.05 3 

20.0001 mA – 200.0000 mA 0.05 + 0.005 3 0.20 + 0.05 3 

0.200001 mA – 2.000000 A 0.05 + 0.005 3 - - - - 

2.00001 A – 20.00000 A 0.10 + 0.03 1.5 - - - - 

range % value + % range max voltage 

Vef 

5 kHz – 10 kHz 

1.0000 µA – 200.0000 µA - - - - 

0.200001 µA – 2.000000 mA 0.50 + 0.07 2 

2.00001 mA – 20.00000 mA 0.50 + 0.07 2 

20.0001 mA – 200.0000 mA 0.50 + 0.07 2 

0.200001 mA – 2.000000 A - - - - 

2.00001 A – 20.00000 A - - - - 

When option 140-50 Current Coil is used, add uncertainty 0.3% of the set current to the value specified in above table. Output current is 

multiplied by factor 50. 

Auxiliary parameters 

range 200 uA 2 mA 20 mA 200 mA 2 A 10 A 

maximal inductive load 400 uH 400 uH 400 uH 400 uH 200 uH 100 uH 

THD *1 0,2% 0,2% 0,2% 0,2% 0,2% 0,3% 

*1 

parameter includes non-linear distortion and non-harmonic noise 


MEATEST 


Function Shape 

current range: 

100 uA to 2 A 

wave form: 

square, positive, negative, symmetrical, ramp A, ramp B, triangle 

truncated sin with THD 13,45 % 

peak value uncertainty: 

0.3 % + 500 nA 

displayed values: 

peak, effective 

Minimum frequency for squarewave signals is 0.1 Hz, for all others 20 Hz. 

Resistance 

summary range: 

resolution : 

Resistance uncertainty 

0 Ω to 50 MΩ 

41/2 digit 

resistance range uncertainty of value [%] *1 *2 current range *3 

0.00 Ω - 100.00 Ω 0.03 + 10 mΩ 1 mA - 40 mA 

100.01 Ω - 400.0 Ω 0.015 400 µA - 20 mA 

400.1 Ω - 2.0000 kΩ 0.015 100 µA - 4 mA 

2.001 kΩ - 10.000 kΩ 0.015 20 µA - 1 mA 

10.001 kΩ - 40.00 kΩ 0.015 4 µA - 200 µA 

40.01 kΩ - 200.00 kΩ 0.015 1 µA - 40 µA 

200.1 kΩ -1.0000 MΩ 0.05 0.2 µA - 10 µA 

1.0001 MΩ - 4.000 MΩ 0.1 40 nA – 2 µA 

4.001 MΩ - 20.000 MΩ 0.2 10 nA – 500 nA 

20.01 MΩ - 50.00 MΩ 0.5 4 nA – 150 nA 

*1 

In range from 0 Ω to 200 kΩ uncertainty is valid for four-terminal connection with use of Option 70 or Option 140-41 cable adapter. For 

two-wire connection from the terminals Hi-Lo na the front panel add to the specified uncertainty next 20 mOhm. 

*2 

In range from 200 kΩ to 50 MΩ uncertainty is valid for two-terminal connection to front panel terminals Hi-Lo. 

*3 

Maximal allowed voltage on output terminals is 8 V pp. 

Capacitance 

summary range: 0.9 nF to 50 µF 

resolution : 

41/2 digit 

Capacitance uncertainty 

range uncertainty of value [%] max. frequency 

0.9000 nF - 2.500 nF 0.5 + 15 pF 1000 Hz 

2.501 nF – 10.000 nF 0.5 + 5 pF 1000 Hz 

10.001 nF – 50.00 nF 0.5 1000 Hz 

50.01 nF – 0.2500 µF 0.5 1000 Hz 

0.2501 µF – 1.0000 µF 0.5 500 Hz 

1.0001 µF – 2.500 µF 1 300 Hz 

2.501 µF – 5.000 µF 1 300 Hz 

5.001 µF – 10.000 µF 1.5 300 Hz 

10.001 µF – 50.00 µF 2.0 300 Hz 

Maximal allowed voltage on output terminals is 8 V pp. 

AC and DC power/energy 

summary voltage range: 

0.2 V to 240 V 

current capability of voltage output: 

depends on the voltage range 

summary current range: 

2 mA to 10 A 

maximal voltage on current output: 

depends on the current range 

electric power range: 

0.0004 to 2.4 kVA 

phase angle ( PF range): 

-180° to +180° (-1 to +1 in PF) 

phase angle ( PF ) resolution: 

0.1° (0.001 in PF) 

time period range: 

1.1 s to 1999 s 

time setting resolution: 0.1s 

time period accuracy: 

0.01% + 0.1 s 


DC, 40 Hz to 400 Hz 



DCV uncertainty 

See table of DCV uncertainty. 



DCI uncertainty 

range % value + % range max. voltage [V] 

2.00000 mA – 20.00000 mA 0.05 + 0.010 3 

20.0001 mA – 200.0000 mA 0.05 + 0.005 3 

0.200001 mA – 2.000000 A 0.05 + 0.005 3 

2.00001 A – 10.00000 A 0.05 + 0.010 1.5 

DC POWER uncertainty 

Uncertainty of DC power can be calculated from the following formula: 

d P = √ ( dU 2 + dI 2 + 0.01 2 ) [%] 

where dP is uncertainty of output power [%] 

dU is uncertainty of set voltage [%] 

dI is uncertainty of set current [%] 

DC ENERGY uncertainty 

Depends on voltage, current, time values. The best uncertainty is 0.016 %. 

ACV uncertainty 

See table of ACV uncertainty. 

ACI uncertainty 

range % value + % range max. voltage [V] 

2.00000 mA – 20.00000 mA 0.05 + 0.010 3 

20.0001 mA – 200.0000 mA 0.05 + 0.005 3 

0.200001 mA – 2.000000 A 0.05 + 0.005 3 

2.00001 A – 10.00000 A 0.05 + 0.010 1.5 

PHASE uncertainty 

frequency range [Hz] phase uncertainty dϕ [°] 

40.000 – 200.000 0.15 

200.001 – 400.000 0.25 

AC POWER uncertainty 

Uncertainty of AC power can be calculated from the following formula: 

for active power d P = √ ( dU 2 + dI 2 + dPF 2 + 0.03 2 ) [%] 

for reactive power d P = √ ( dU 2 + dI 2 + dPF* 2 + 0.03 2 ) [%] 

for apparent power d P = √ ( dU 2 + dI 2 + 0.03 2 ) [%] 

where dP is uncertainty of power [%] 

dU is uncertainty of set voltage [%] 

dI is uncertainty of set current [%] 

dPF is uncertainty of power factor (cosϕ) [%] 

For calculation of dPF is valid following formula: 

dPF = (1 – cos (ϕ+dϕ)/cos ϕ) * 100 [%] 

where ϕ is set phase shift between voltage and current outputs 

dϕ is uncertainty of set phase shift in table above 

dPF* is uncertainty of of sinϕ [%] 

For dPF* is valid following formula: 

dPF* = (1 – sin (ϕ+dϕ)/sin ϕ) * 100 [%] 


MEATEST 


Example: 

Set parameters: 

U = 100 V, I = 10 A, cos ϕ = 0.5, f = 50 Hz, displayed value of active power in W 

Output voltage uncertainty: dU = 0.025 % value + 0.010 % range = 0.045 % 

Output current uncertainty: dI = 0.05 % value + 0.01 % range = 0.06 % 

Uncertainty due the set phase shift: PF 0.5 corresponds phase shift 60 ° 

dPF = (1 – cos (60+0.15)/cos 60) * 100 = (1 – 0.4977/0.5) * 100 = 0.45 % 

Output power uncertainty: dP = √ ( 0.045 2 + 0.06 2 + 0.45 2 + 0.03 2 ) = 0.46 % 

POWER FACTOR (PF) 

range: -1.000 to +1.000 

PF uncertainty can be calculated for any set value of output voltage, current and PF from following formula: 

dPF = (1 – cos (ϕ+dϕ)/cos ϕ) * 100 [%] 

where ϕ is set phase shift between voltage and current 

dϕ is uncertainty of set phase shift from the above table 

AC ENERGY uncertainty 

It depends on set value of voltage, current, time and PF. The best uncertainty is 0.07% for apparent energy. 

Frequency 

summary range: 


frequency uncertainty: 0.005 % 



output: 

BNC connector located on the front panel 

modes: 

- PWM square wave output with calibrated duty cycle ratio, frequency and 

amplitude 

- HF square wave output with calibrated frequency and amplitude 

Mode PWM 


0.1 Hz to 100 kHz 

voltage range: 

1 mV to 10 V 

duty cycle ratio range: 0.01 to 0.99 

wave form: 

square, symmetrical– positive – negative 

duty cycle ratio uncertainty: 0.05 % 

signal noise (20 Hz – 1 MHz): 

< 2 mV from 0.1Hz to 10 kHz 

< 10 mV from 10kHz to 100 kHz 

Amplitude uncertainty (average top/bottom square signal level) 

range % value + V % value + mV 

0.1 Hz to 10 kHz 10kHz to 100 kHz 

1.00000 mV – 20.00000 mV 0.2 + 0.02 mV 0.2 + 0.1 mV 

20.0001 mV – 200.0000 mV 0.1 + 0.02 mV 0.1 + 0.1 mV 

0.200001 mV – 2.000000 V 0.1 + 0.02 mV 0.1 + 0.1 mV 

2.00001 V – 10.00000 V 0.1 + 0.02 mV 0.1 + 0.1 mV 

Mode HF 



output impedance: 

50 Ω 

wave form: square symmetrical, duty cycle ratio 1:1 

amplitude: 

4 V pk-pk 

output amplitude range: 

0, -10, -20, -30 dB +/- 1 dB 

amplitude uncertainty: 10 % 

rise/fall time: 

< 3 ns 



Temperature sensors simulation 

temperature scale: ITS 90, PTS 68 

types of sensors: 

RTD, TC 

A. RTD (resistance) sensors 

types: 

range of R0 setting: 

temperature range: 

temperature uncertainty: 

resolution: 

Ranges and uncertainties of RTD sensor simulation 

type range –200 – 250 o C range 250 – 850 o C 

Pt100 0.1 o C 0.3 o C 

Pt200 0.1 o C 0.2 o C 

Pt1000 0.2 o C 0.4 o C 

Pt 1.385, Pt 1.392, Ni 

20 Ω to 2 kΩ 

-200 to +850 o C 

0.04 o C to 0.5 o C (see table bellow) 

0.1 o 

Ni100 0.07 o C *1 - - 

*1 

Valid in range –60 to +180 o C. 

Uncertainties in the table are maximal uncertainties of RTD sensor simulation. Actual uncertainty for each set value of 

simulated temperature is determined by uncertainty of relevant resistance. Actual temperature uncertainty is displayed on the 

calibrator display. Actual uncertainties are always lower than those in above table. 

B. TC sensors: 

types: 

temperature range: 

temperature uncertainty: 

resolution: 

K, N, R, S, B, J, T, E 

-250 to +1820 o C according to the type 

0.4 to 4.3 o C (see table bellow) 

0.1 o 

Ranges and uncertainties of TC sensor simulation (with function AUTOCAL ON) 

R range [ o C] -50 - 0 0 - 400 400 – 1000 1000 – 1767 

uncertainty [ o C] 3.2 2.1 1.4 1.7 

S range [ o C] -50 - 0 0 - 250 250 – 1400 1400 – 1767 


B range [ o C] 400 – 800 800 - 1000 1000 – 1500 1500 – 1820 


J range [ o C] -210 - -100 -100 - 150 150 – 700 700 – 1200 


T range [ o C] -200 - -100 -100 - 0 0 – 100 100 – 400 


E range [ o C] -250 - -100 -100 - 280 280 – 600 600 – 1000 


K range [ o C] -200 - -100 -100 - 480 480 – 1000 1000 – 1372 


N range [ o C] -200 - -100 -100 - 0 0 – 580 580 – 1300 


Uncertainties in the table are maximal uncertainties of TC sensor simulation. Actual uncertainty for each set value of 

simulated temperature is determined by uncertainty of relevant resistance. Actual temperature uncertainty is displayed on the 

calibrator display. Actual uncertainties are always lower than those in above table. 


MEATEST 


Multimeter 

Measuring: 

Ranges and uncertainties 

DC voltage 

DC current 

resistance, temperature 

strain gauge sensors 

function total range uncertainty (%) resolution / range 

DC voltage - DCV *1 0 to +/-12.0000 V 0.01 % + 300 µV 100µV / 10V 

DC voltage - mVDC *1 0 to +/-2.00000 V 0.02 % + 7 µV 20mV / 100nV, 200mV / 1uV, 2V / 10uV 

DC current *1 0 to +/-25.0000 mA 0.015 % + 300 nA 100 nA/20mA 

Frequency 1.000 Hz to 15 000.00 Hz 0.005 10 µHz – 0.1 Hz 

Resistance *2 0.000 to 2 500.00 Ω 0.02% + 10 m Ω 20Ω / 1mΩ, 200Ω / 1mΩ, 2kΩ / 10mΩ 

Temperature - PT sensor -200.000 to +850.000 o C *3 0.1 o C 0.1 o C 

Temperature – TC sensor -250.00 to +1820.00 o C *4 see Table 0.01 o C 

Strain gauge sensors *5 depends on sensor 0.05 % + 10 µV + uncertainty of 

sensor 

*1 Uncertainties are valid after performing ZERO correction in set mode 

*2 Measuring current 1 mA 

*3 For Pt 1000 sensor maximum temperature is 350 o C. Maximum measured resistance is 2 kΩ. 

*4 Maximum allowed analogue input DC voltage is 2 V. 

*5 Supply voltage: 2 to 10 V DC, non-symmetrical 

Max. current: 

40 mA 

Input resistance: 

min. 100 MΩ 

Sensitivity: setable in range 0.5 mV to 100 mV /V 

Displayed unit : 

user´s defined 

Ranges and uncertainties of temperature measuring with TC sensor 

R range [ o C] -50 - 0 0 – 400 400 – 1000 1000 – 1770 


S range [ o C] -50 - 0 0 – 250 250 – 1400 1400 – 1770 


B range [ o C] 400 - 800 800 – 1000 1000 – 1500 1500 – 1820 


J range [ o C] -210 - -100 -100 – 150 150 – 700 700 – 1200 


T range [ o C] -200 - -100 -100 - 0 0 – 100 100 – 400 


E range [ o C] -250 - -100 -100 - 280 280 – 600 600 – 1000 


K range [ o C] -200 - -100 -100 - 480 480 – 1000 1000 – 1372 


N range [ o C] -200 - -100 -100 – 0 0 – 580 580 – 1300 


Sorting function 

Output GO/NG: 

Triggering : 

1 x make, 1 x break contacts, 50Vpp / 100mA 

external, internal, manual 



General data 

Warm up time: 

60 minutes 

Operating temperatures: 23 ± 10 º C, relative humidity < 75% 

Temperature coefficient 

Temperature coefficient for temperature outside of Tcal 

±2°C from +13 ° C to +33 ° C is 0.1x specified accuracy / ° C 

Reference temperature: 

23 ± 2 º C 

Storage temperatures: 

-10 º C to +55 º C 

Dimension: 

450 x 480 x 150 mm 

Netto weight 

23 kg 

Power line: 

115 - 220/230 V – 50/60 Hz 

Power consumption: 

45 VA without load 

Max. 150 VA with full load 

Safety class: I according EN 61010 ed 2 

Used external fuses: F4L250V 1 pcs 

Used internal fuses: F1.6L250V 3 pcs 

F200mL250V 

2 pcs 

F2.5L250V 

2 pcs 

Accessories 

Basic accessories (included in delivery) 

• Power line cord 1 pc 

• User´s manual 1 pc 

• Test report 1 pc 

• Spare fuse 2 pc 

• Test cable 1000V/20A, 1m 2 pc 

• Option 40 Cable adapter Canon 25 / 2 x BANANA, 1 m 1 pc 

• Option 60 Cable adapter Canon 25 / 4 x BANANA, 1 m 1 pc 

• Option 70 Adapter for four-terminal resistance generation 1 pc 

• Cable RS RS-232 cable 1 pc 

Options (extra ordered) 

• 140-50 Current coil 50 turn 

• 140-01 Cable adapter for calibration of multimeters 

• 140-02 Set of cables 

• 140-41 Cable adapter for simultaneous calibration/measuring 

• Option 10 Output cable 20A/1000V (black) 

• Option 11 Output cable 20A/1000V (red) 

• Option 20 Output cable BNC/BNC 

• Option 30 Output cable BNC/BANANA 

• Option 40 Output cable D-SUB25/ 2xBANANA, 1 m 

• Option 60 Output cable D-SUB25/ 4xBANANA, 1 m 

• Option 100 Adapter for ¾” output terminals spacing 

• Cable GPIB IEEE488/IEEE488, 2m 

• Cable RS Cable RS-232 for connecting to PC 

• WinQbase SW for calibration of instrument 

• MEACA Program module for multimeters 

• Caliber Program module for multimeters 

Manufacturer 

MEATEST, s.r.o tel: +420 – 543 250 886 

Zelezna 3, 619 00 Brno fax: +420 – 543 250 890 

Czech Republic 

meatest@meatest.cz 

www.meatest.com 


MEATEST 


Operation Manual Supplement 

Manual Title: 

M140 

Issue date: 9/2012 

Supplement issue: 001 

This supplement contains information necessary to ensure the accuracy of the above manual. 

Change 1 

On page 123 the original text under the table “Resistance uncertainty” has been replaced with the following: 

Maximal allowed voltage on output terminals is 8 V pp . Uncertainty is valid for four-terminal connection with use 

of Option 70 or Option 140-41 Cable adapters. For two-wire connection from the terminals Hi-Lo na the front 

panel add to the specified uncertainty next 20 mOhm. 

Change 2 

On page 123 text under the table “Resistance uncertainty” has been added: 

In range from 200 kΩ to 50 MΩ uncertainty is valid for two-terminal connection to front panel terminals Hi-Lo.

M140 Multifunction Calibrator / Tester - meatest.cz

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